|First appearance||Marvel Team-Up #23 (July 1974)|
|Created by||Len Wein and Gil Kane|
|Alter ego||Terrance "Terry" Sorenson|
|Notable aliases||Thermodynamic Man|
|Abilities||Superhuman strength and durability
Equinox, the Thermodynamic Man, first appeared in Marvel Team-Up vol. 1 #23 (July 1974), and was created by Len Wein and Gil Kane. He also appeared in Giant-Size Spider-Man #1, also in July 1974, and a two-part story in Marvel Team-Up vol. 1 #59-60 (July–August 1977).
After a nearly 20-year hiatus, the character appeared sporadically, appearing in Marvel Comics Presents #147 (February 1994), Code of Honor #1 (January 1997), Spider-Man Unlimited #12 vol. 2 (January 2006), and Heroes for Hire vol. 2 #1 (October 2006). A Skrull impersonator of Equinox appeared in Avengers: The Initiative #12 (June 2008) and #18.
Equinox received an entry in the All-New Official Handbook of the Marvel Universe A-Z #4 (2006).
Fictional character biography
Equinox is an African-American youth who gained superhuman powers due to accidental exposure to his father's malfunctioning equipment after a lab accident. (His mother is Margay Sorenson, head of natural sciences at Bard College.)
Equinox's powers were similar to the combined abilities of superheroes the Human Torch and Iceman, with whom he first battled, as well as enhanced strength and durability. He engages in conflict with the superheroes Spider-Man, Yellowjacket, and the Wasp, during which his origin was revealed, the three heroes managing to apparently cure him using technology conceived by his mother and constructed in the Baxter Building while the Fantastic Four were away.
Equinox appears during the Civil War event, and when the registration law is announced, he wants to leave the country again. He contacts Vienna to make him a new fake identity, but unbeknownst to him, Vienna secretly works for Heroes for Hire who apprehend Equinox and several other supervillains.
During the Secret Invasion storyline, Equinox was revealed to be a Skrull infiltrator and attacked his teammates. The Skrull-Equinox not only had the abilities of Firestar and Iceman to match the real Equinox' powers, he also had some of Spider-Man's abilities. He froze Hardball, Ryder and Riot (of the Skrull Kill Krew) in ice and broke the glass over Think Tank's brain. The Skrull-Equinox was sniped in the head by Cloud 9 using adamantium bullets.
After the invasion is over, the real Equinox is seen, although miscolored, in a support group meeting with the others that had been replaced by Skrulls. Equinox has since retaken active service with the Freedom Force. Due to his criminal past, Norman Osborn chooses his team between the ones assembled by Stark to help some other Initiative teams to apprehend the seceding Heavy Hitters team.
Following the Avengers vs. X-Men storyline, Equinox participates in a prison riot. Mimic and Rogue respond to the riot. Copying the powers of Equinox, Armadillo, and Man-Bull, Mimic and Rogue stop the riot.
Equinox returns in the All-New, All-Different Marvel when he is brainwashed by Kang the Conqueror's splintered half Mister Gryphon to attack the Avengers. Mister Gryphon creates multiple temporal replicas of Equinox by having his future selves aid him in his assault. However, he is defeated when Spider-Man pretends to be under Kang's influence in order to identify the earliest version of Equinox present as the only one surprised at his conversion and then knock him out, eliminating all the future Equinoxes as well.
Powers and abilities
Equinox possesses both pyrokinesis and cryokinesis as well as superhuman strength and durability. He continually undergoes "thermal transitions" so that part of his body is always aflame and part of his body is covered with ice. The strain of these powers has driven him increasingly insane over time.[volume & issue needed]
In other media
- Equinox appears in Marvel: Ultimate Alliance 2, voiced by Jimmie Wood. He is shown injected with a controlling nanite and unleashed upon the heroes when they infiltrate Prison 42.
- Marvel Team-Up (vol. 1) #60 (August 1977)
- Marvel Team-Up #23
- Marvel Team-Up (vol. 1) #59-60 (July–August 1977)
- Marvel Comics Presents #147
- Spider-Man Unlimited (vol. 2) #12
- Heroes for Hire (vol. 2) #1
- Avengers: The Initiative #12
- Avengers: The Initiative #18
- Avengers: The Initiative #20
- Avengers: The Initiative #28
- The Amazing Spider-Man #682
- X-Men: Legacy #275
- All-New, All-Different Avengers #5
- All-New, All-Different Avengers #6