Crisis on Earth-X
|"Crisis on Earth-X"|
|Arrowverse crossover event|
Promotional poster and home media cover
|Original air dates|
"Crisis on Earth-X" is the fourth annual Arrowverse crossover event, featuring episodes of the live-action television series Supergirl, Arrow, The Flash, and Legends of Tomorrow on The CW. The crossover began on November 27, 2017, with Supergirl and Arrow, and concluded on November 28, with The Flash and Legends of Tomorrow. In "Crisis on Earth-X", Barry Allen and Iris West's friends come to Central City for their wedding, only for the proceedings to be interrupted by interlopers from the analogous universe of Earth-X where World War II was won by the Axis Powers.
Development for a crossover of the four series began in December 2016 after the release of the previous crossover, "Invasion!". The premise and title of the crossover were revealed in September 2017 as production on the episodes began; elements from the animated web series Freedom Fighters: The Ray were part of the crossover, including the live-action appearance of Ray Terrill (The Ray), the Freedom Fighters, and the New Reichsmen. A subsequent crossover aired the following year, titled "Elseworlds".
- 1 Plot
- 2 Cast and characters
- 3 Production
- 4 Release
- 5 Reception
- 6 Notes
- 7 References
- 8 External links
A Nazi regime rules the parallel world of Earth-X, where an archer known as Dark Arrow is the Führer. He seizes a temporal gateway from the Freedom Fighters, which enables travelling to other universes. On Earth-1, Barry Allen and Iris West's friends, including Kara Danvers and Alex Danvers from Earth-38, come to Central City for Barry and Iris's wedding. Harry Wells, Cisco Ramon, and Caitlin Snow develop a serum to separate the Firestorm matrix from Martin Stein and Jefferson Jackson. However, Jefferson is reluctant to give up being Firestorm. Oliver Queen re-proposes to Felicity Smoak, but she is hesitant about marrying him. The wedding ceremony is interrupted by invaders from Earth-X led by Dark Arrow, his Kryptonian wife Overgirl, and Prometheus. After Kara injures Overgirl, and Alex and Sara Lance capture Prometheus, the Nazis retreat. Dark Arrow and Overgirl, who are Oliver and Kara's doppelgängers respectively, discuss their next step with Eobard Thawne, Barry's speedster nemesis who was previously presumed dead.
In S.T.A.R. Labs, Prometheus reveals himself as Tommy Merlyn's Earth-X doppelgänger, then takes a suicide pill out of loyalty to the Nazi regime after taunting Oliver. Harry reveals that through his exploration of the multiverse, he discovered that Earth-X is a dystopian world where World War II was not won by the Allied Forces. Dark Arrow, Overgirl, and Thawne steal an experimental sub-light generator, the Prism, from a research company. Oliver's team, along with Harry, Caitlin, Cisco, and Mick Rory, are in captivity at S.T.A.R. Labs after the Nazi forces occupy it. Oliver, Barry, Sara, Martin, Jefferson, and Alex are abducted to a concentration camp on Earth-X, while Kara is moved to S.T.A.R. Labs. Overgirl is dying from disproportionate insolation in her heart and Dark Arrow plans to use the Prism, powered by S.T.A.R. Labs' particle accelerator, to create artificial red sunlight that can weaken both Karas' invulnerability, allowing Thawne to conduct a heart transplant from Kara to Overgirl.
In the concentration camp, the heroes are rescued from execution at the hands of SS-Sturmbannführer Quentin Lance by Ray Terrill and Leo Snart. Thawne prepares to operate on both Overgirl and Kara, and Iris and Felicity work to rescue their friends at S.T.A.R. Labs. General Winn Schott, the commander of the Freedom Fighters, is determined to strand Dark Arrow and Overgirl on Earth-1 by destroying their temporal gateway. While posing as Dark Arrow, Oliver discovers the Nazis' doomsday device, a timeship called Wellenreiter, a militarized equivalent of the Legends' Waverider. Oliver allows the timeship to enter Earth-1 to avoid jeopardizing his cover, but he is ultimately exposed when he refuses to kill Felicity's Earth-X doppelgänger, a concentration camp prisoner. The heroes struggle against both the Freedom Fighters' Red Tornado, deployed by Schott as a failsafe, and the Nazi forces, and the gateway's portal is opened at the cost of Martin being mortally wounded.
The heroes return to Earth-1, and Iris, Felicity, Kara, and the others are rescued by the returned heroes and the Waverider crew. Jefferson is also affected by Martin's injury, so Martin uses the serum to separate the Firestorm matrix and dies from his wounds. Jefferson tells Martin's family of his fate; they, along with the Legends and Barry's team are devastated by Martin's death. His death spurs the heroes to declare war on Earth-X's Nazi forces. When the Nazis attack Central City, the heroes counter their assault. Harry, who pilots the Waverider, destroys the Wellenreiter after the heroes disable its shield. Barry spares Thawne, who vows to return. During the fight with Kara, Overgirl's solar radiation goes nuclear and Kara carries her into space, where Overgirl explodes. Oliver kills Dark Arrow soon after. After Martin's funeral, Kara and Alex return to Earth-38, Ray returns to Earth-X, and Leo decides to remain with the Legends. John Diggle, an ordained minister, officiates Barry and Oliver's weddings with Iris and Felicity, respectively.
Cast and characters
Main and recurring
- Note: Despite being credited, Katie McGrath and Odette Annable do not appear in the Supergirl episode; David Ramsey, Willa Holland, Katie Cassidy and Paul Blackthorne do not appear in the Arrow episode; and Jesse L. Martin does not appear in The Flash episode.
- Jesse L. Martin as Joe West
- Keiynan Lonsdale as Wally West / Kid Flash
- Jessica Parker Kennedy as a caterer[a]
- Danielle Nicolet as Cecile Horton
- Patrick Sabongui as David Singh
- William Katt as a minister
Yearly crossover events in the Arrowverse have occurred on The CW since the 2013–14 television season, when Barry Allen was introduced in the eighth episode of Arrow's second season ahead of the debut of The Flash. The next year, the eighth episodes of the first season of The Flash and the third season of Arrow formed a two-part event known as "Flash vs. Arrow". In January 2015, The CW president Mark Pedowitz said that there would be an Arrowverse crossover every season. In the 2015–16 television season, a two-part event between the eighth episodes of the second season of The Flash and the fourth season of The Arrow was used to set up a new team-up series, Legends of Tomorrow. For the 2016–17 television season, the "Invasion!" crossover included The Flash, Arrow, and Legends of Tomorrow, with the event beginning at the end of Supergirl.
Planning for the crossover began in December 2016, with Arrow showrunner Wendy Mericle saying, "We actually sort of do, believe it or not, have a concept for what we want to do for next year's crossover. It's crazy." By February 2017, planning began for a true four-way series crossover. Because each series was renewed for an additional season, the producers could plan production schedules to incorporate the crossover. Executive producer Andrew Kreisberg said, "One of the big things we learned from ["Heroes Join Forces"], which made ["Invasion!"] slightly easier, was building in shut-down days, where shows just went dark. The single hardest factor in doing the crossovers is actors' availability because the shows keep going on. You're basically juggling four shows' worth of schedules." That May, Pedowitz confirmed that there were no plans to incorporate Black Lightning in the crossover, as it was not part of the Arrowverse at that time and was scheduled to debut in the middle of the 2017–18 television season.
In September 2017, it was revealed that the title of the crossover would be "Crisis on Earth-X" and that Ray Terrill (The Ray) would make his live-action debut in the Arrowverse, ahead of appearing in the animated web series, Freedom Fighters: The Ray, along with other characters and concepts from that series. Russell Tovey also voices the character in Freedom Fighters.
In June 2017, executive producer Marc Guggenheim noted that it would be hard to top "Invasion!"'s threat of aliens, so this crossover would aim to "increase the emotional stakes and the emotional payoffs". The following month, Mericle added that the crossover would be "very much rooted in the DCU." At the Television Critics Association press tour in August 2017, Pedowitz said that the crossover would involve romance, with Berlanti adding, "our way of making the show bigger this year was to go even more personal, so it's a big life event for a few different people on the show. There are many life events that happen." In September 2017, in a statement revealing the crossover's title, Guggenheim and Kreisberg said that the crossover was conceived "to be evocative of the annual Justice League/Justice Society [comic book series] crossovers we grew up with and looked forward to as kids." The story of the crossover was conceived by Kreisberg and Guggenheim. The teleplay for Supergirl's episode was written by showrunners Robert Rovner and Jessica Queller, Arrow's by Mericle and Ben Sokolowski, The Flash's by showrunner Todd Helbing, and Legends of Tomorrow's by showrunner Phil Klemmer and Keto Shimizu.
Filming of the four episodes began on September 22, 2017. Supergirl's episode was directed by Larry Teng, Arrow's by James Bamford, The Flash's by Dermott Downs, and Legend of Tomorrow's by Gregory Smith.
Blake Neely, primary composer of all four series, composed the two-and-a-half-hour score for the crossover in eight days at The Bridge Recording Studio in Glendale, California. La-La Land Records released the soundtrack physically on June 5, 2018, in a limited run. WaterTower Music also released it digitally on June 15, 2018.
"Free Stress Test" by Professor Murder, "Justice" by Misun, "All Eyes On You" by St. Lucia, "By the Stream" by Tom Hillock & Nicolas Boscovic, "Love Is Emotional" by Neil Finn, "String Quartet No. 62 in C Major, Op. 76, No. 3, Hob. III:77, "Emperor": II. Poco Adagio, Cantabile" by Kodály Quartet, and "Runnin' Home to You" from the musical crossover "Duet" performed by Melissa Benoist are heard in the first part of the crossover but not included in the soundtrack.
All music composed by Blake Neely, Nathaniel Blume, Daniel James Chan, and Sherri Chung.
|Crisis On Earth-X (Original Television Soundtrack)|
|1.||"The Flag Still Stands"||3:20|
|2.||"We're Going To The Wedding"||1:19|
|3.||"Dark Arrow, The Fuhrer"||1:19|
|4.||"Pretending Nothing Happened"||1:39|
|5.||"Best Wedding Ever!"||4:41|
|6.||"Prometheus-X Locked Away"||3:38|
|7.||"A Special Kind Of Idiot"||3:14|
|8.||"Oliver Wants a Yes"||2:26|
|9.||"Being True To Yourself"||2:32|
|10.||"Sides Meet - Saving The Building"||3:43|
|11.||"Big Messy Brawl With Nazis"||2:27|
|12.||"Dark Arrow Storms The Lab"||2:58|
|13.||"Overgirl Needs a Heart"||3:18|
|14.||"March To Their Deaths - Meeting the Ray"||2:34|
|16.||"Sneaking Oliver In"||2:03|
|17.||"Inside Nazi Command Center"||4:25|
|19.||"A Hero Falls"||1:18|
|20.||"Ending a Tornado To Open a Breach"||2:22|
|21.||"Breached Back Into Mayhem"||2:56|
|22.||"Like a Father"||3:52|
|25.||"Disabling The Shields"||2:41|
|26.||"For The Win!"||1:49|
|27.||"A Kiss Goodbye - Surprise Double Wedding"||4:51|
The crossover began with Supergirl and Arrow on November 27, 2017, and concluded on The Flash and Legends of Tomorrow on November 28, all on The CW. Arrow, which normally aired on Thursdays at 9 pm, moved to Monday at 9 pm for the crossover and did not air an additional episode on November 30. Pedowitz stated that they decided to have the crossover occur over two nights, as opposed to the four nights of "Invasion!", because The Flash and Legends of Tomorrow were already paired together on The CW's schedule, and "it would be better and tighter in terms of storytelling to make it like a two-night, four-hour miniseries. We thought this was a tight, concise way of doing it." Guggenheim added, "We're really approaching this big four-part event as two back-to-back two-hour movies, and I think when you look at it through that lens, it becomes less important for the Supergirl episode to feel like a Supergirl episode and the Arrow episode to feel like an Arrow episode, which was always our approach in the past."
Comic artist Phil Jimenez created a custom cover for the event, which invokes the cover design of the Justice League comic issue #207, the 20th Annual Justice League of America/Justice Society of America crossover. Promotional trailers for the event were released throughout November, before the full trailer was released on November 20.
All four episodes and the behind-the-scenes featurette "Inside the Crossover: Crisis on Earth-X", were released on Blu-ray and DVD in Region 1 along with the rest of Arrow's sixth season on August 14, 2018, with The Flash's fourth season on August 23, with Supergirl's third season on September 18, and with Legends of Tomorrow's third season on September 25. The four episodes were released together on a separate DVD on September 3, 2018 in Region 2, and September 5 in Region 4. Unlike the previous crossover, "Invasion!", the episodes of "Crisis on Earth-X" were not released as a seamless cut; this was due to "union rules regarding credit" according to Marc Guggenheim.
|Supergirl||November 27, 2017||0.9/3||2.71||0.7||1.72||1.6||4.43|
|Arrow||November 27, 2017||0.9/3||2.52||0.8||1.89||1.7||4.41|
|The Flash||November 28, 2017||1.0/4||2.82||0.7||1.83||1.7||4.64|
|Legends of Tomorrow||November 28, 2017||0.9/4||2.80||0.8||1.82||1.7||4.62|
Speaking about the crossover as a whole, Jesse Schedeen of IGN felt that "ultimately, 'Crisis on Earth-X' set a higher standard for what these crossovers can achieve than last year's 'Invasion!'". Scott Mendelson of Forbes said the "Crisis on Earth-X" was "a better Justice League movie than the actual Justice League movie and in many ways was better or at least equal to the best MCU crossover events." Rob Leane of Den of Geek thought the crossover was the "best crossover yet", saying, "It offers fresh ideas alongside heaps of fan service, and the special effects wizards behind the scenes make the limited TV budget feel like that of a massive movie."
Schedeen gave the Supergirl episode an 8.1 out of 10. While he felt that the Supergirl episode "clearly isn't in much of a hurry to get where it's going", Schedeen said it did "prove to be a very entertaining start to the crossover." Ultimately, the episode "did, however, make the most of this massive pairing of heroes, delivering an endless stream of banter and character drama before transitioning into an epic battle royale. There are certainly worse ways to kick off a crossover." Caroline Siede at The A.V. Club awarded the episode a "B+" rating. She said the episode "isn't a particularly great episode of Supergirl, but then again it isn't really trying to be. And as the first hour of an ambitious four-part Arrowverse movie, it's hard to ask for anything more." Kayti Burt of Collider gave the episode 4 out of 5 stars, stating, "I was wildly impressed with the storytelling ambitious 'Crisis on Earth-X' has shown so far. There were some narrative missteps, but this is like nothing we have ever seen on-screen before: a true comic book-style crossover event that ties hours of superhero serials together in one epic story."
Schedeen gave the Arrow episode a 7 out of 10, saying that the episode "struggled to find that balance between character drama and plot progression, as well as in establishing stakes big enough to support such a massive crossover in the first place. But for all its flaws, at least this episode still included some entertaining moments and a generally strong portrayal of its twisted villains." The A.V. Club's Allison Shoemaker gave the episode a "B" rating. She thought it was "difficult to judge how successful this episode of Arrow is because it's neither an episode of Arrow nor a complete story," but concluded, "it's a lot of fun, kind of dumb, and just not as exciting as what came before. Someone has to check those boxes and set up what comes next, and it seems that this time, Arrow drew the 'event' short straw."
Schedeen awarded The Flash's episode a 9.2 out of 10, noting that while part 1 had "a slow start" and part 2 gave "a fairly underwhelming follow-up... the crossover finally seemed to click" in part 3. Scott Von Doviak at The A.V. Club gave the episode a "B+" rating, stating "Even a lesser installment like this one features the spectacle of the Flash and The Ray battling the Red Tornado, as well as the appealing non-superpowered Nazi-fighting team of Iris and Felicity. For the most part, I've felt like a kid coming home with a fresh stack of comics, and I can think of no higher praise than that." Mike Cecchini of Den of Geek gave it 4 out of 5 stars. He wrote that while "'mirror universe Nazis' don't make for the most nuanced of villains, and when you're using concentration camp imagery, well, you'd better make sure you're not being exploitative," The Flash's episode "completely embraces its lunacy in ways that I don't even think those first two chapters dreamed of."
Legends of Tomorrow
Schedeen gave the final episode an 8.5 out of 10 rating. The episode "didn't have quite the urgency it needed during the final showdown between good and evil," but "did make the most of Professor Stein's heroic sacrifice and its emotional fallout." Oliver Sava of The A.V. Club gave the episode an "A" rating, stating "No piece of live-action superhero media has captured the feeling of a comic-book crossover event like Crisis On Earth-X. With a huge cast of characters, a major death, and a final scene taking big heroes in bold new directions, Crisis delivers the thrills, the twists, and the inspiration that should come from a superhero story with this massive scope." Jim Dandy from Den of Geek rated the episode 5 out of 5 stars. He wrote, "This year's was an objectively wonderful hour of DC television, but it also moved the season's story along for Legends in a meaningful way, and provided significant character development for Jax and Sara. It gave Franz Drameh and Victor Garber a chance to stretch their acting wings, and it closed out a timely, wall-to-wall entertaining four hours of television." Collider's Carla Day gave the Legends episode 5 stars out of 5, saying the crossover was "leaps and bounds better than any of the previous crossovers." She went on to say that "It set the standard high for all future crossovers in the story, character interactions, and fight scenes."
- Mitovitch, Matt Webb (September 26, 2018). "Arrowverse Crossover Theme Is 'Elseworlds,' Casts Multiverse Observer". TV Line. Archived from the original on September 26, 2018. Retrieved September 26, 2018.
- Burlingame, Russ (November 9, 2017). "'Crisis on Earth-X' Arrowverse Crossover Description Released". Comicbook.com. Archived from the original on November 10, 2017. Retrieved November 10, 2017.
- Wickline, Dan (November 18, 2017). "CW Releases 92 Images From Arrowverse Crossover: Crisis On Earth-X". Bleeding Cool. Archived from the original on November 18, 2017. Retrieved November 18, 2017.
- Joest, Mick (November 21, 2017). "Two Surprise Arrow-verse Characters Who Will Apparently Get Earth-X Versions In The Big Crossover". Cinema Blend. Archived from the original on November 22, 2017. Retrieved November 22, 2017.
- Ausiello, Michael (September 22, 2017). "Arrowverse Crossover: Quantico's Russell Tovey Cast as Gay Superhero". TVLine. Archived from the original on September 25, 2017. Retrieved September 25, 2017.
- MacDonald, Lindsay (November 22, 2017). "The Flash Mega Buzz: A WestAllen Wedding Guest May Hint at the Future". TV Guide. Archived from the original on November 23, 2017. Retrieved November 23, 2017.
- Abrams, Natalie (May 22, 2018). "The Flash boss on that Mystery Girl reveal, new season 5 threat". Entertainment Weekly. Archived from the original on May 23, 2018. Retrieved May 23, 2018.
- "The Greatest American Cameo Coming To Crisis On Earth-X". Bleeding Cool. November 24, 2017. Retrieved July 17, 2018.
- Schwartz, Terri (November 27, 2017). "Arrow Cast Responds To That Long Anticipated Cameo Appearance". IGN. Archived from the original on November 30, 2017. Retrieved November 30, 2017.
- MacDonald, Lindsay (November 28, 2017). "Wedding Bells Were Ringing in the Arrowverse Crossover Finale". TV Guide. Archived from the original on February 22, 2018. Retrieved July 17, 2018.
- Anderson, Jenna (November 28, 2017). "'Arrow' Veteran Susanna Thompson Has a Surprise Role in 'Crisis on Earth-X'". ComicBook.com. Archived from the original on November 30, 2017. Retrieved November 30, 2017.
- Nguyen, Hanh (January 11, 2015). "The CW Renews Supernatural and 7 More – But Where's Beauty and the Beast?". TV Guide. Archived from the original on April 30, 2017. Retrieved January 11, 2015.
- Abrams, Natalie (May 19, 2016). "The CW announces four-way crossover with Arrow, The Flash, Legends of Tomorrow, Supergirl". Entertainment Weekly. Archived from the original on May 22, 2016. Retrieved May 19, 2016.
- Schneider, Michael (September 9, 2016). "Greg Berlanti Interview: How TV's Superhero Guru is Managing Crossovers, 'Supergirl's Move and New Inspirations". Indiewire. Archived from the original on November 17, 2016. Retrieved November 10, 2016.
- Abrams, Natalie (October 18, 2016). "Arrow boss teases 100th episode, crossover catalyst". Entertainment Weekly. Archived from the original on October 21, 2016. Retrieved October 18, 2016.
- Burlingame, Russ (October 23, 2016). "Marc Guggenheim Reveals the Title of Arrow's 100th Episode". ComicBook.com. Archived from the original on December 20, 2016. Retrieved October 23, 2016.
- Avila, Mike (December 19, 2016). "EXCLUSIVE: Arrow showrunner talks Flashpoint, the future of Olicity and Season 6". SyfyWire. Archived from the original on December 20, 2016. Retrieved December 20, 2016.
- Abrams, Natalie (February 24, 2017). "CW eyes true four-way superhero crossover next season". Entertainment Weekly. Archived from the original on August 7, 2017. Retrieved August 7, 2017.
- Abrams, Natalie (May 18, 2017). "The CW's Black Lightning not part of Arrowverse, crossover unlikely". Entertainment Weekly. Archived from the original on August 7, 2017. Retrieved August 7, 2017.
- Agard, Chancellor (September 22, 2017). "Arrow, The Flash, Supergirl, Legends unite for 'Crisis on Earth-X' crossover". Entertainment Weekly. Archived from the original on September 25, 2017. Retrieved September 22, 2017.
- Abrams, Natalie (June 30, 2017). "Spoiler Room: Scoop on Game of Thrones, Blindspot, OUAT, and more". Entertainment Weekly. Archived from the original on August 7, 2017. Retrieved August 7, 2017.
- Agard, Chancellor (July 22, 2017). "Arrow showrunner teases next 'epic' crossover will be rooted in the DCU". Entertainment Weekly. Archived from the original on July 23, 2017. Retrieved July 25, 2017.
- Schwartz, Terri (August 2, 2017). "This Arrowverse Crossover Will Fully Take Place Across Every Show From Supergirl To Legends of Tomorrow". IGN. Archived from the original on August 7, 2017. Retrieved August 7, 2017.
- MacDonald, Lindsay (November 23, 2017). "Crisis On Earth X: Blake Neely composes epic Two & Half Hour score for DC/WB crossover event". An Englishman In San Diego. Archived from the original on November 23, 2017. Retrieved November 23, 2017.
- Burlingame, Russ (May 16, 2018). "Arrowverse "Crisis on Earth-X" Crossover Soundtrack Getting Official CD Release". Comicbook.com. Archived from the original on May 20, 2018. Retrieved May 20, 2018.
- "Crisis On Earth-X (Original Television Score)". WaterTower Music.
- "Crisis On Earth-X (Original Television Score)". Apple Music.
- "S3 · E8 · Crisis on Earth-X, Part 1". TuneFind.
- Abrams, Natalie (August 2, 2017). "CW sets two-night event for four-way superhero crossover". Entertainment Weekly. Archived from the original on August 4, 2017. Retrieved August 4, 2017.
- Abrams, Natalie (November 6, 2017). "CW releases first look at Crisis on Earth-X superhero crossover". Entertainment Weekly. Archived from the original on November 7, 2017. Retrieved November 7, 2017.
- Damore, Meagan (November 13, 2017). "Arrowverse: New Crisis on Earth-X Promo Offers Closer Look at Villains". Comic Book Resources. Archived from the original on November 16, 2017. Retrieved November 16, 2017.
- Couto, Anthony (November 19, 2017). "Arrowverse Unites to Stop 'Doomsday' Threat in Crisis On Earth-X Promo". Comic Book Resources. Archived from the original on November 19, 2017. Retrieved November 19, 2017.
- Erao, Matthew (November 20, 2017). "DC Heroes Battle Their Evil Selves in Full Crisis On Earth-X Trailer". Screen Rant. Archived from the original on November 22, 2017. Retrieved November 22, 2017.
- "Arrow: The Complete Sixth Season". Amazon. Retrieved September 12, 2018.
- "The Flash: The Complete Fourth Season". Amazon. Retrieved September 12, 2018.
- "Supergirl: The Complete Third Season". Amazon. Retrieved September 12, 2018.
- "DC's Legends of Tomorrow: The Complete Third Season". Amazon. Retrieved September 12, 2018.
- "Crisis on Earth X". Amazon. Retrieved September 12, 2018.
- "Crisis on Earth-X - DC Crossover TV Event". JB HiFi. Retrieved September 12, 2018.
- Joest, Mick (January 14, 2018). "Crisis On Earth-X Was Nearly Released As A 'Seamless' Movie". CinemaBlend. Retrieved September 12, 2018.
- Porter, Rick (November 29, 2017). "'CMA Country Christmas,' 'Good Doctor,' 'Pentatonix Christmas' adjust down: Monday final ratings". TV by the Numbers. Archived from the original on November 30, 2017. Retrieved November 29, 2017.
- Porter, Rick (December 15, 2017). "CW crossovers get another bump in week 10 broadcast Live +7 ratings". TV by the Numbers. Archived from the original on December 15, 2017. Retrieved December 15, 2017.
- Porter, Rick (November 30, 2017). "'The Flash,' 'This Is Us' and 'Rudolph' adjust up: Tuesday final ratings". TV by the Numbers. Archived from the original on November 30, 2017. Retrieved November 30, 2017.
- Schedeen, Jesse (December 1, 2017). "Arrowverse: Why the 'Crisis on Earth-X' Crossover Topped 'Invasion!'". IGN. Retrieved December 7, 2017.
- Mendelson, Scott (November 29, 2017). "The Year's Best 'Justice League' Movie Didn't Need Batman Or Superman". Forbes. Retrieved December 7, 2017.
- Leane, Rob (December 7, 2017). "DC TV: why the Crisis On Earth-X crossover was the best yet". Den of Geek. Retrieved December 7, 2017.
- Schedeen, Jesse (November 27, 2017). "Supergirl: 'Crisis on Earth X, Part 1' Review". IGN. Retrieved December 7, 2017.
- Siede, Caroline (November 27, 2017). "Supergirl hops Earths, punches Nazis as The CW's crossover extravaganza begins". The A.V. Club. Retrieved December 7, 2017.
- Burt, Kayti (November 27, 2017). "'Arrow' and 'Supergirl' Recap: 'Crisis on Earth-X' Parts 1 & 2". Collider. Retrieved December 7, 2017.
- Schedeen, Jesse (November 27, 2017). "Arrow: 'Crisis on Earth-X, Part 2' Review". IGN. Retrieved December 7, 2017.
- Shoemaker, Allison (November 28, 2017). "The crisis continues in Arrow's piece of The CW's Earth-X crossover". The A.V. Club. Retrieved December 7, 2017.
- Schedeen, Jesse (November 28, 2017). "The Flash: 'Crisis on Earth-X, Part 3' Review". IGN. Retrieved December 7, 2017.
- Von Doviak, Scott (November 28, 2017). "The Flash gets lost in an overstuffed chapter of an entertaining crossover event". The A.V. Club. Retrieved December 7, 2017.
- Cecchini, Mike (November 29, 2017). "The Flash Season 4 Episode 8 Review: Crisis on Earth X Part 3". Den of Geek. Retrieved December 7, 2017.
- Schedeen, Jesse (November 28, 2017). "DC's Legends of Tomorrow: 'Crisis on Earth-X, Part 4' Review". IGN. Retrieved December 7, 2017.
- Sava, Oliver (November 28, 2017). "Crisis On Earth-X ends with big twists and a massive superhero showdown". The A.V. Club. Retrieved December 7, 2017.
- Dandy, Jim (November 29, 2017). "Legends of Tomorrow Season 3 Episode 8 Review: Crisis on Earth-X Part 4". Den of Geek. Retrieved December 7, 2017.
- Day, Carla (November 28, 2017). "'The Flash' and 'Legends of Tomorrow' Recap: 'Crisis on Earth-X' Parts 3 & 4". Collider. Retrieved December 7, 2017.
|Wikiquote has quotations related to: Crisis on Earth-X|