Symbol of Hydra as shown on Captain America: Steve Rogers #19 (July 2017)
|First appearance||Strange Tales #135 (Aug 1965)|
|Created by||Stan Lee (writer)|
Jack Kirby (artist)
Baron Helmut Zemo
Werner von Strucker
Bob, Agent of Hydra
Hydra is a fictional terrorist organization appearing in American comic books published by Marvel Comics. The name "Hydra" is an allusion to the mythical Lernaean Hydra. The organization's motto references the myth of the Hydra, stating that "If a head is cut off, two more shall take its place", proclaiming their resilience and growing strength in the face of resistance. Hydra agents often wear distinctive green garb featuring a serpent motif.
Hydra has appeared in various media adaptations of television shows and films set in the Marvel Cinematic Universe.
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Hydra first appeared in Strange Tales #135 (August 1965). In its original continuity, it was headed by nondescript businessman Arnold Brown, who was killed as S.H.I.E.L.D. apparently crushed the organization. Hydra soon returned, however, headed by Baron Wolfgang von Strucker, with the support of the Nazi Red Skull; Hydra's changing origin was one of Marvel's earliest retcons. After its initial defeat, several of its branches, such as its scientific branch A.I.M. (Advanced Idea Mechanics) and the Secret Empire, became independent.
Crypt of Shadows #3, published in 1973, reprinted a story from Menace #10 (1954), but with a change to a line of dialogue that erroneously implied that Hydra was first mentioned in the 1954 issue. In the reprint, an agent of an unspecified enemy government was changed to identify himself as working for Hydra when he paid off a scientist named Dr. Nostrum for information about a cobalt bomb that turned people into monsters. Dr. Nostrum shot all the other scientists on his team after they were turned into monsters, then shot himself after his son put an image from a monster magazine on his mirror.
—The Hydra oath from Strange Tales #135 (Aug. 1965)
Before the evolution of mankind, a cabal of immortal hooded reptoids came to Earth, planning to start a legacy of evil. Millions of years later, they corrupted an Asian secret society of geniuses known as the Brotherhood of the Spear, which resulted in that group being called "the Beast" by the Brotherhood of the Shield. The corrupted Brotherhood of the Spear spread out, ingraining itself like a multi-headed serpent into all facets of human society, from science to magic to politics. As time wore on, the organization's name changed and it included the Cathari sect, as well as the Thule Society. The Nazi sub-group, funded by the Thule Society, was brought into the main Hydra fold after the end of World War II.
One of the Nazi members, Baron Wolfgang von Strucker, quickly seized control of the Hydra organization and restructured it to be dedicated to world domination through terrorist and subversive activities on various fronts, resulting in a global neo-fascist New Order. To this end, Baron von Strucker used his personal fortune, based on his recovered hoard of Nazi plunder from World War II, and funds established by the original leaders of the Japanese secret society that became part of the old Hydra. However, after von Strucker's first death, Hydra broke into factions (such as A.I.M., the Secret Empire, THEM, etc.) that each adopted its own reorganized modus operandi. Eventually, this fragmentation would lead to a Hydra civil war, even after von Strucker's resurrection.
According to the files discovered by Nick Fury, Hydra is split into four independent sectors:
- International Corporations (Fronts created using a legitimate business to conceal illicit activities)
- Government Assets (Individuals within the chain of command. Long-term resources that benefit from the minimal turnover inherent in bureaucracies)
- Global Criminal Groups (Subsidiary organizations created for short-term goals. Also used to deflect unwanted interest from the global law enforcement community)
- Intelligence Gathering (S.H.I.E.L.D. and all their underlying resources) Hydra regards S.H.I.E.L.D. as their "most valuable proactive intelligence asset" while its government assets include the U.S. Department of the Treasury, the FBI, and the NSA, as well as the Canadian Security Intelligence Service and the GRU and SVR of Russia.
Nick Fury theorized that his previous successes against Hydra were either feints to make him believe that he was making headway against the group or manipulation by Hydra to eliminate any possible competition or possible rogue sub-organizations.
In the aftermath of the Secret Invasion and Baron von Strucker's second death, there followed a series of power struggles, which eventually left Hydra without a formal leader. The splintering of Hydra accelerated, with various cells operating seemingly independently. Eventually, the Red Skull, returning to his Nazi beliefs, started building a new Hydra from the ground up. However, this brought him into conflict with Baron Zemo, who was trying to control what was left of the old Hydra.
The Red Skull convinced his now-aware Cosmic Cube, Kobik, to cooperate with S.H.I.E.L.D. in creating Pleasant Hill and discovered that Kobik could alter people's memories to make them believe they had been members of the Hydra of which the Red Skull had told them stories. However, the Red Skull failed to realize that the Hydra he was building and the Hydra Kobik had created false memories of were two different things, with the now-Hydra Captain America disobeying the Red Skull and planning something else.
Hydra's level of technology is as highly advanced as that of any on Earth, based in part on technology of the alien Gnobians discovered by Baron von Strucker in 1944. Hydra uses various advanced experimental vehicles and devices in its activities, and various conventional military vehicles, seacraft, aircraft, pistols and standard concussive force blasters, and conventional communications equipment.
Hydra personnel are issued cowled jumpsuits, which have included a number of designs over the years. Originally, the jumpsuits were green with a yellow H design, and later incorporated a red and brown color scheme, but in time were changed back to green with a serpent motif.
Fictional organization history
Hydra's history as depicted in Marvel Universe continuity is a long, tumultuous and convoluted one, spanning millennia, and going back to the Third Dynasty of Egypt, with all references to the ancient group disappearing around the Renaissance. The modern incarnation of Hydra was originated when the Nazi spymaster known as the Red Skull took control of an Asian secret society, the Brotherhood of the Spear, merging it with a German occult organization, the Thule Society.
Some time before 1943, the Red Skull started creating a Hydra cell in Japan, merging several underground Japanese secret societies, including a faction of the Hand, with several fugitive members of Nazi Germany and Imperial Japan, to become the modern Hydra. This incarnation of Hydra operated in Japan, directed by a Japanese militarist called the Supreme Hydra, and in Germany, under the control of the Red Skull and Arnim Zola. However, after joining Hydra, Baron Wolfgang von Strucker seized control of the organization and constructed the Hydra base Tsunami - called Hydra Island. The original Hydra Island was invaded by the Leatherneck Raiders and the Japanese Samurai Squad, and the base was destroyed. Strucker then slowly steered the organization towards the goal of world domination. That campaign brought him into conflict with Charles Xavier and the future Magneto, among others, and once Hydra became more brazenly public in its operations, eventually led to the creation of the original agency known as S.H.I.E.L.D., specifically to counter Hydra's threat to world security. After Hydra apparently assassinated S.H.I.E.L.D.'s first executive director, Col. Rick Stoner, Nick Fury was appointed as executive director. Hydra agents attempted to assassinate Nick Fury before his appointment as S.H.I.E.L.D.'s director, but failed.
After several failed Hydra campaigns, including the failure of the world blackmail attempt using the Betatron Bomb, the creation of the Overkill Horn (designed to detonate all nuclear explosives worldwide), and the bio-engineered "Death-Spore" Bomb, which led directly to Strucker's first death at the hands of Fury, and several deceived Hydra operatives. In the wake of Strucker's first death, the surviving elements of Hydra broke into factions that each adopted its own reorganized modus operandi. Several of these factions developed "super-agents" that would occasionally break away in turn to become freelance operatives, or, in some rarer cases, superheroes such as the first Spider-Woman. During this era, Hydra's collective threat was mitigated by not only occasionally infighting among themselves, but their operating policy of punishing failure with death, often led to their killing of each other more often than their intended victims. Hydra frequently found itself defeated by S.H.I.E.L.D., various superheroes, and even unpowered civilians, like the motorcycle racing team, Team America. Strucker was eventually revived, and he reunited several of the Hydra factions under his leadership, renewing his campaign against S.H.I.E.L.D. and humanity for several more years.
Despite his reorganization of the group, various independent Hydra factions continued to operate around the Marvel Universe, and a Hydra Civil War would later result. While Baron Helmut Zemo had Strucker placed in stasis for his own ends, the Gorgon and Strucker's second wife, Elsbeth von Strucker, mystically created a clone of Strucker, whom they set up to fail, allowing for a public execution of him, after which, as part of an alliance with the Hand, they utilized an army of brainwashed superheroes and supervillains, including Northstar and Elektra, to launch a massive assault on S.H.I.E.L.D. The assault was ultimately repelled, and Wolverine would go on to kill the Gorgon.
Hydra later planned an all-out attack on the United States by smuggling missiles into New York for use in a planned bio-weapon assault on the Ogallala Aquifer. They formed a distraction through using a team that had the duplicated powers of several Avengers, (Iron Man and Captain America, and former Avengers Thor and Hawkeye), but were inevitably foiled by Spider-Man and the other New Avengers.
When Spider-Woman (Jessica Drew) was captured by S.H.I.E.L.D. during the events of Civil War, Hydra stormed the S.H.I.E.L.D. Helicarrier and freed her. Spider-Woman, a S.H.I.E.L.D. agent and member of the Avengers, had been working undercover for Hydra under the orders of Nick Fury, now deposed as Director of S.H.I.E.L.D. following the events of Secret War, to whom she was still loyal. Hydra revealed that they knew of her betrayal, and wanted her to replace the Viper as their current leader, as she was unstable. Spider-Woman refused their offer, destroying in an explosion the Hydra base to which she had been taken.
As Spider-Woman revealed her true identity as Queen Veranke of the Skrull Empire, Hydra was left with a void in its control organization, which was then filled by Congressman Woodman. Under his rule, the young Hardball, empowered by the Power Broker, was appointed as a double agent, acting both as an Initiative recruit and as a Hydra spy, with the role of gathering information about the Initiative and doing errands for Hydra in exchange for secrecy and the expensive health care needed by his brother, a former UCWF wrestler, who was crippled in the ring.
Hardball, however, deeply hurt and shamed by the compromises Woodman forced him to endure and Komodo's attempt to bail him out of Hydra by telling his secrets to his field leader Gravity, mercilessly killed Congressman Woodman in front of his subordinates. His ersatz coup d'état paid off, and Hardball was appointed as the new Supreme Leader of the organization, severing every tie with his former life. His joining Hydra, however, was revealed to be caused simply by his having nowhere else to go. He surrendered to the Shadow Initiative, and was sent to the Negative Zone prison, destroying his Hydra cell.
After the events of Secret Invasion, Nick Fury discovered that S.H.I.E.L.D. was under the control of Hydra, and apparently had been from the beginning. He also discovered a number of organizations under Hydra's alleged control, including the United States' FBI Science and Technology Branch, the NSA, and the U.S. Department of the Treasury, along with the Russian Main Intelligence Directorate and Foreign Intelligence Service, and the Canadian Security Intelligence Service.
Meanwhile, after having destroyed Hydra's undersea headquarters, Ichor, due to its having been infiltrated by the Skrull invasion force, Strucker rebuilt Hydra from the ground up, and after his discovery that Fury had learned the truth, reconvened the other main heads of Hydra: the Viper, Madame Hydra, Kraken, and the Hive, as well as resurrecting the Gorgon for the purpose of showing Hydra's "true self" to the world.
Hydra (alongside A.I.M.) later appeared in an alliance with H.A.M.M.E.R. Following the defeat of Norman Osborn, H.A.M.M.E.R. was disbanded, with Madame Hydra using the remaining members to reinforce Hydra.
After the existence of Pleasant Hill, a top-secret community where Maria Hill incarcerated various supervillains (after brainwashing them to believe they were regular civilians via a sentient Cosmic Cube named Kobik), was exposed and subsequently shut down, the Red Skull's clone used the subsequent backlash in the intelligence community to assemble a new version of Hydra, starting with Sin and Crossbones. Although his efforts were still focused on rebuilding the organization, he had already scored a significant victory, after the sentient Cosmic Cube, having been "raised" by the Red Skull in the form of a little girl, to see Hydra as a great organization, altered Steve Rogers' memories so that he believed he had been a Hydra sleeper agent since childhood.
During the "Secret Empire" storyline, Hydra's plans came to fruition, as the mind-altered Steve Rogers used the Planetary Defense Shield to trap those who were fighting the Chitauri, stranding them beyond the Shield, and having Baron Zemo use the Darkhold to enhance Blackout's powers to entrap all of Manhattan within the Darkforce following the fight between the superheroes there and Baron Zemo's Army of Evil. Having taken political and military control of the United States, Hydra proceeded to round up and incarcerate all Inhumans, and all mutants were condemned to the western California territory of New Tian. Becoming the Hydra Supreme, Captain America formed Hydra's version of the Avengers, consisting of the Scarlet Witch who is possessed by Chthon, the Vision who was suffering from an A.I. Virus created by Arnim Zola, Odinson, the Taskmaster, Deadpool, Eric O'Grady's Life Model Decoy counterpart the Black Ant, and Doctor Octopus' form of the Superior Octopus. Throughout this period, Hydra encountered resistance from the Underground. Sam Wilson, the original Falcon, and currently the All-New Captain America, brought hope to the resistance with a plan to bring their real Captain America back by using the remaining Cosmic Cube, under Scott Lang and the Winter Soldier's hand on the Hydra Supreme's Cosmic Cube-infused Hydra suit. As Hydra began to fall, most of Hydra's Avengers members, Odinson, the Taskmaster, and the Black Ant, began to betray Hydra, joining the resistance, while the Vision and the Scarlet Witch were freed from the villains' control. Deadpool came to regret his betrayal of his friends, having killed Phil Coulson and Emily Preston and having lied to Emily's family, with Maria Hill having given him a painful lesson. Kobik returned the real Captain America with his memories intact, and with the Hydra Supreme defeated, Hydra's reign over the United States came to an end, with major casualties being Rick Jones, Phil Coulson, and the Black Widow, who had been killed. The Hydra Supreme was imprisoned in the Shadow Pillar as he was visited by Captain America to bring up the fact that he will stand trial for his crimes. After leaving, the Hydra Supreme was chained up as one of the guards whispered "Hail Hydra" into his ear.
Due to the Hydra Supreme's imprisonment, Baron Zemo had to keep Hydra active. He planned to spring the Hydra Supreme from the Shadow Pillar, only to meet opposition from the Punisher in the War Machine Armor. After the attempted jailbreak was thwarted, the Hydra Supreme was apprehended, while Baron Zemo got away.
During the "Spider-Geddon" storyline, Arnim Zola led a bio-duplicate of the Gorgon and some Hydra agents to the Superior Octopus' lair, where Arnim Zola tried to get the Superior Octopus to help rebuild Hydra. The Superior Octopus turned him down, stating that he had upheld his bargain to Hydra, as Arnim Zola claimed that one does not leave Hydra until their death. After defeating the Hydra Agents, the bio-duplicate of the Gorgon, and Arnim Zola, the Superior Octopus had Arnim Zola spread the word to Hydra to never come after him again.
An alternate version of Hydra has appeared in Amalgam Comics. They are very similar to the mainstream version of Hydra and wear the same green and yellow outfits, but with black eyes instead of red. They first appear in Super-Soldier #1 (April 1996) and are led by the Green Skull, alias Lex Luthor (a cross between Luthor and the Red Skull).
Another alternate version of Hydra appears throughout Exiles #91-94, where they are well underway with their plan to take over the world. This version is being led by Madame Hydra (Sue Storm, the Invisible Woman in the regular Marvel universe) and her lover, Wolverine. Various other superhumans, including Captain America (now Captain Hydra) and Slaymaster, are agents of Hydra in this world.
Secret Wars (2015)
- One version of Hydra ruled the Battleworld domain of the Hydra Empire, which was based on the remnants of Earth-85826. The members of this Hydra consisted of Arnim Zola, Grant Ward, Dum Dum Dugan, Nick Fury Jr., and the Toad. In addition to female assassins possessed by Hydra's version of the symbiotes called Vipers, Hydra also had its own version of the Avengers, consisting of Captain Hydra (Leopold Zola), Chancellor Cassandra, Doctor Mindbubble, the Iron Baron (Baron Strucker), Lord Drain, and Venom.
- Another version of Hydra resided in the Battleworld domain called the Walled City of New York, which was based on the remnants of Earth-21722. The members of this Hydra were Arnim Zola, Baron Strucker, Baron Heinrich Zemo, Hank Johnson, MODOK, the Red Skull, and the Viper. Hydra controlled one section of the Walled City of New York in opposition to S.H.I.E.L.D.'s section.
The Ultimate Marvel version of Hydra appears when Spider-Man was presumed dead following the events of the Ultimatum storyline. J. Jonah Jameson recalled the time when Spider-Man saved Tony Stark from an attack by Hydra, led by the Viper.
In more recent Ultimate titles, Hydra has been described as an "anti-government" organization (though their political philosophy is left deliberately vague). Modi (Thor's son) is seen in allegiance with them, and acquiring weapons from Project Pegasus, including Modi using the Mind Gem on Director Flumm (to attempt to kill the U.S. President), and Giant-Woman attacking Spider-Man (until stopped by his "venom-strike"). They are defeated by both S.H.I.E.L.D. and the Ultimates, although some members escaped.
Nick Fury later masqueraded as Scorpio and infiltrated Hydra and came across Abigail Brand, a Hydra soldier who captures and brings Fury to Commander Crimson. Commander Crimson later sends Brand to the Death's Head Camp along with Fury until they are rescued. S.H.I.E.L.D. Director Monica Chang grants Fury permission to re-form the Howling Commandos to stop Hydra.
In other media
- In The Incredible Hulk episode "Enter: She-Hulk", the Hulk and the She-Hulk battle Hydra's forces. The Supreme Hydra featured was Steve Perry.
- Hydra appeared in the X-Men: Evolution episodes "X-23" and "Target X". They were behind the creation of X-23 from Wolverine's DNA. Viper appears to be the Supreme Hydra, while Omega Red and Gauntlet are shown as mercenaries working for Hydra.
- Hydra appears as a recurring foe in The Avengers: Earth's Mightiest Heroes. First appearing in the episode "Meet Captain America", Hydra was a branch of Nazi Germany under Baron Heinrich Zemo, with Red Skull as the group's super soldier and Baron Strucker working under Red Skull. In the present with Baron Strucker leading it, its known members are Grim Reaper and Viper, while Baron Heinrich Zemo and Arnim Zola have distanced themselves from Hydra.
- Hydra appears in Avengers Assemble. They are first seen in the episode "The Avengers Protocol Part 1".
- Hydra is featured in Agents of S.H.I.E.L.D., a television series set in the Marvel Cinematic Universe. Hydra is introduced in the middle of season one as part of a tie-in with the film Captain America: The Winter Soldier. Besides Dr. List and the mentionings of Baron Strucker, as well as a younger Jasper Sitwell being shown in a flashback, its featured members are John Garrett (portrayed by Bill Paxton), double-agent Grant Ward (portrayed by Brett Dalton), Daniel Whitehall (portrayed by Reed Diamond), Sunil Bakshi (portrayed by Simon Kassianides), Werner von Strucker (portrayed by Spencer Treat Clark), Gideon Malick (portrayed by Powers Boothe), General Hale (portrayed by Catherine Dent), and General Hale's genetically-engineered daughter Ruby (portrayed by Dove Cameron). John Garrett was the mastermind behind Project Centipede, a subset of the S.H.I.E.L.D. faction. Daniel Whitehall and Sunil Bakshi's faction wanted to find a lost city that a Diviner is associated with where they used Hydra Industries as a front. Grant Ward's short-lived faction (which included Werner Von Strucker) wanted to unite Hydra while planning revenge on Phil Coulson's group. It is later revealed that the original Hydra movement, led by Gideon Malick, is a fanatical cult that worships an ancient powerful Inhuman entity called the Hive. General Hale's faction wanted S.H.I.E.L.D. to unite with them and the Confederacy when it comes to the approaching threat of Thanos. In season seven, the Chronicom hunter's targets include a young Freddy Malick. The Chronicom-enhanced Life Model Decoy of Phil Coulson and Daisy Johnson state that "to save S.H.I.E.L.D., we have to save Hydra."
- Hydra briefly appears in Ultimate Spider-Man. Known members are Arnim Zola, Crossbones, Baron Mordo, and Dr. Michael Morbius. In the episode "Great Power", Spider-Man imagines Nick Fury fighting Hydra members. It is also referenced in the episode "S.H.I.E.L.D. Academy" when the Iron Spider and Spider-Man accidentally freed the old Hydra scientist Arnim Zola from his containment. Hydra will have a larger role in the fourth season, working with the Sinister Six.
- Hydra appear as recurring antagonists in Marvel Future Avengers. They are working in collaboration with Kang the Conqueror's incarnation of the Masters of Evil. Red Skull is a known member of Hydra. Hydra is shown to have kidnapped and genetically manipulated several young children to make them into super soldiers, raising them to believe Hydra are heroes and the Avengers are villains. Makoto, Adi, and Chloe, three of these children, discover the truth and defect to the Avengers, while a fourth named Bruno is recruited by the Masters of Evil.
- Hydra appears in Spider-Man.
- Hydra appears in the television film Nick Fury: Agent of S.H.I.E.L.D.. The Hydra agents are shown with Men in Black-type suits, rather than the green uniforms from the comics.
- Hydra agents appear at the beginning of the animated film Ultimate Avengers 2 fighting against Captain America. They are identifiable by their green uniforms.
- Hydra appeared in Heroes United: Iron Man and Hulk. The Hydra scientists Dr. Cruler and Dr. Fump hire the Abomination to catch the Hulk for an experiment. They later turn on the Abomination to use him in the same experiment.
- Hydra appears in Heroes United: Iron Man & Captain America.
- Hydra is a key element in the Marvel Cinematic Universe, founded on a belief that humanity could not be trusted with its own freedom, and must be subjugated for its own good.
- Hydra first appears in the 2011 film Captain America: The First Avenger. Hydra is under the leadership of the Red Skull, depicted to have originally started as an advanced science branch for the Third Reich, utilizing several experimental aircraft such as the Focke-Wulf Triebflügel VTOL aircraft and a huge intercontinental flying-wing bomber based in part on the Horten Ho 229 design.
- Despite its apparent disbanding, Hydra resurfaces in Captain America: The Winter Soldier. Hydra is secretly sustained by Arnim Zola and, later, his reconstructed personality within S.H.I.E.L.D., breeding chaos over the post-World War II era in order for humanity to submit willingly. Under the leadership of Alexander Pierce, his plan was to carry out mass assassinations of citizens recognized as a threat to Hydra, based on Zola's algorithm to force the world into submission. Hydra's S.H.I.E.L.D. element is ultimately destroyed by Captain America, the Black Widow and the Falcon. In the mid-credits scene, a branch of Hydra under Baron Strucker is revealed to have been using Loki’s scepter to create weapons and superhumans.
- Hydra appears in Avengers: Age of Ultron, when the Avengers raid their last known base in order to stop them once and for all. They successfully defeat Strucker and retrieve Loki's scepter, although they also find the twins Quicksilver and the Scarlet Witch, as well as other alien tech. Later on, the film's antagonist Ultron kills Strucker and recruits the twins to help him destroy the Avengers.
- Hydra appears in Ant-Man. Darren Cross attempts to sell his Yellowjacket technology to a Hydra group led by Mitchell Carson. Ant-Man is able to defeat the agents, while Carson escapes with a vial of Cross' particles as he is being attacked by ants.
- Hydra is featured in Captain America: Civil War. Hydra official Vasily Karpov (portrayed by Gene Farber) oversaw the Winter Soldier program. Years later, Helmut Zemo raids his home in Cleveland, Ohio and tortures him for the information about the Winter Soldier Program by having his head half-submerged in a sink filled with water, while the rest of him was heavily submerged. After claiming the book containing the Winter Soldier trigger words, Zemo resumed the filling of the sink. In his final words, Karpov quoted "Hail Hydra."
- Hydra appears in Avengers: Endgame. The time traveling Captain America meets up with Hydra sleeper agents led by Brock Rumlow posing as S.H.I.E.L.D. operatives in 2012. It was revealed that S.H.I.E.L.D. gathered everything related to the Tesseract, including Loki's scepter. Knowing that they are with Hydra, he tricks them into handing him Loki's scepter by whispering "Hail Hydra."
- Hydra appears in X-Men: The Official Game. In the game, Hydra is partially responsible for the creation of the Master Mold and the Sentinel robots alongside William Stryker. Under orders of their leader the Silver Samurai, Hydra infiltrates Stryker's base to remove all evidence and Sentinel equipment, and by accident, activated the Master Mold.
- Hydra is the major villain in the rare Sega 32X video game titled Spider-Man: Web of Fire.
- In Marvel: Ultimate Alliance 2, one of the levels includes an old Hydra base that the Anti-Registration group was using.
- Hydra's aerial base can be seen attacking the S.H.I.E.L.D. Helicarrier in the latter's stage in Marvel vs. Capcom 3: Fate of Two Worlds. The organization's logo can also be seen on the car that attempts to run the She-Hulk down in one of her special moves.
- Hydra appears as the central antagonists in the video game Captain America: Super Soldier.
- Hydra is featured in Marvel: Avengers Alliance. Known members include Baron Helmut Zemo, Moonstone, Viper, and the Hydra Four. Hydra's Power Armors appear as bosses and were created from stolen Stark Industries technology. Their foot soldiers consist of Hydra Ballistas, Hydra Burners, Hydra Cannons, Hydra Judicators, Hydra Officers, Hydra Pyros, Hydra Soldiers, and Hydra Vanguards.
- Hydra is featured in Avengers Initiative, with its members serving as enemies in the Captain America chapters of the game.
- Hydra appears in Marvel Heroes.
- Hydra Agents appear in Lego Marvel Super Heroes.
- Hydra appears in Lego Marvel Super Heroes 2. Known members include Red Skull, Baron Helmut Zemo, Arnim Zola, the Hydra Supreme version of Captain America, and the Hydra Four. One section of Chronopolis is the Hydra Empire which was taken from a reality in which Hydra won World War II and ruled the world. Captain America, Black Panther, and Star-Lord follow Klaw and Hydra Four members Bowman and Tactician to the Hydra Empire following the Vibranium heist in Wakanda. In addition to fighting Klaw, Captain America, the Black Panther, and Star-Lord had to fight the Vibranium Troopers and Baron Zemo in his biplane. A bonus mission narrated by Gwenpool that took place in the Hydra Empire had Morbius the Living Vampire, the Man-Thing, and N'Kantu the Living Mummy building a float for the Red Skull Honorary Parade in Hydra Square.
- SS-Totenkopfverbände – A real-life organization in Nazi Germany responsible for running the concentration camps and death camps. This group also used a skull in its insignia.
- "A Marvel Editor Explains How Captain America Was a Hydra Agent All Along". TIME. May 25, 2016. Retrieved May 26, 2016.
- Official Handbook of the Marvel Universe HC entry for Hydra
- DeFalco, Tom; Sanderson, Peter; Brevoort, Tom; Teitelbaum, Michael; Wallace, Daniel; Darling, Andrew; Forbeck, Matt; Cowsill, Alan; Bray, Adam (2019). The Marvel Encyclopedia. DK Publishing. p. 180. ISBN 978-1-4654-7890-0.
- Wolverine vol. 3 #29
- S.H.I.E.L.D. #4
- Fear Itself: Book of the Skull #1
- Secret Warriors #1
- Secret Warriors #2
- All-New Captain America #4
- Ms. Marvel (vol. 4) #1
- Free Comic Book Day 2015 #Avengers
- Deadpool (vol. 4) #7
- Avengers: Standoff at Pleasant Hill Omega
- Captain America: Steve Rogers #3
- Captain America: Steve Rogers #2
- Captain Savage and his Leatherneck Raiders #2-4
- Strange Tales #135
- Avengers: The Initiative Special #1
- Avengers: The Initiative #24
- New Avengers (vol. 2) #18
- Avengers (vol. 4) #24
- Avengers Standoff: Assault on Pleasant Hill Omega #1
- Secret Empire #0. Marvel Comics.
- Secret Empire #1. Marvel Comics.
- Secret Empire #9. Marvel Comics.
- Deadpool (vol. 4) #35. Marvel Comics.
- Secret Empire #10. Marvel Comics.
- Secret Empire Omega #1. Marvel Comics.
- Punisher #227-228. Marvel Comics.
- Superior Octopus #1. Marvel Comics.
- Exiles #92
- Hail Hydra #1
- Hank Johnson, Agent of Hydra #1
- Ultimate Requiem: Spider-Man #1
- Ultimate Comics: Spider-Man #16
- Ultimate Comics: Ultimates #18
- Ultimate Comics: Ultimates #20
- Ultimate Comics: Ultimates #21
- Medinnus, David (January 1, 2011). "An Interview With Christopher Yost". Retrieved April 1, 2011.
- Tancharoen, Kevin (director); George Kitson (writer) (May 27, 2020). "The New Deal". Marvel's Agents of S.H.I.E.L.D. Season 7. Episode 1. ABC.
- "Marvel's Spider-Man & the Avengers Will Return with All-New Seasons to Disney XD". June 1, 2015.
- "Spider-Island: Part 2". Spider-Man. Season 1. Episode 20. February 4, 2018. Disney XD.
- "Twitter / Marvel: Watch an exclusive clip from Marvel's "Iron Man & Captain America"". Twitter.com. December 3, 2013. Retrieved August 15, 2014.
- "Red Skull's Escape Vehicles (2011)". MonsterMinions. July 22, 2011. Retrieved August 1, 2011.
- Maksel, Rebecca (August 9, 2011). "Captain America and the Horten Brothers". Air & Space/Smithsonian. National Air and Space Museum - Smithsonian Institution. Retrieved August 15, 2011.
- Dyce, Andrew (May 7, 2016). "Every Captain America: Civil War Easter Egg & Secret". Screen Rant. Archived from the original on May 14, 2016. Retrieved May 9, 2016.
- Aldrin Calimlim (December 13, 2012). "Thumbs Up, Soldier! Captain America Enters The Avengers Initiative". AppAdvice. Retrieved August 15, 2014.
- "Hydra Hijinks". IGN Database. Retrieved January 24, 2018.
- "Character Reveals for Marvel Universe LIVE! | News". Marvel.com. Retrieved August 15, 2014.