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Crisis on Earth-X, Part 4 

The gang comes together for Barry and Iris's wedding, but the ceremony is crashed by villains from Earth-X.


Gregory Smith


Greg Berlanti (developed by), Marc Guggenheim (developed by) | 6 more credits »




Episode cast overview, first billed only:
Victor Garber ... Dr. Martin Stein
Brandon Routh ... Ray Palmer / The Atom
Caity Lotz ... Sara Lance / White Canary
Franz Drameh ... Jefferson Jackson / Firestorm
Maisie Richardson-Sellers ... Amaya Jiwe / Vixen
Amy Louise Pemberton ... Gideon (voice)
Tala Ashe ... Zari Tomaz
Nick Zano ... Nate Heywood / Steel
Dominic Purcell ... Mick Rory
Stephen Amell ... Oliver Queen / Green Arrow / Black Arrow
David Ramsey ... John Diggle
Emily Bett Rickards ... Felicity Smoak
Tom Cavanagh ... Dr. Harry Wells / Eobard Thawne / Reverse-Flash
Chyler Leigh ... Alex Danvers
Candice Patton ... Iris West


Barry (guest star Grant Gustin) and Iris's (guest star Candice Patton) wedding brings the gang together, but things go awry when villains from Earth-X attack the ceremony. All of the superheroes band together with help from their super friends like Citizen Cold (guest star Wentworth Miller), The Ray (guest star Russell Tovey), Felicity Smoak (guest star Emily Bett Rickards), Iris West and Alex Danvers (Chyler Leigh) to take on their most formidable villains yet. Earth's mightiest heroes - Green Arrow (guest star Stephen Amell), Supergirl (Melissa Benoist), The Flash (guest star Grant Gustin) and White Canary (guest star Caity Lotz) - lead their teams into battle to save the world.

Plot Summary | Add Synopsis


TV-14 | See all certifications »

Parents Guide:

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Release Date:

28 November 2017 (USA) See more »

Company Credits

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Technical Specs


Sound Mix:




Aspect Ratio:

16:9 HD
See full technical specs »

Did You Know?


This is the fourth part of a four-part crossover event, begun in Supergirl episode 3x8 "Crisis on Earth-X, Part 1," then Arrow episode 6x8 "Crisis on Earth-X, Part 2," then The Flash episode 4x8 "Crisis on Earth-X, Part 3," and concluded here. See more »


As Oliver makes his speech before the final fight with the Nazis, Steel is seen with a helmet under his arm. However, he is never shown to be wearing one. See more »


Curtis Holt: [stepping aboard the Waverider] Oh, man, I have just died and went to geek heaven.
Zari Tomaz: [to Amaya] Told you we picked the right guy.
Curtis Holt: Uh, picked the right guy to do what?
Amaya Jiwe: Hunt Nazis. Meet our resident Earth-X expert, The Ray.
Ray Terrill: Well, uh, you can use my real name Ray Terrill.
Curtis Holt: [shakes Ray's hand] Your secret identity is your first name with the word "the" in front of it.
Ray Terrill: Yeah. Why? What's your secret identity?
Curtis Holt: Mr. Terrific.
Ray Terrill: Really? That's a little boast-y, don't you think?
Curtis Holt: Nah, it's just one of my favorite ...
See more »

Crazy Credits

The usual opening narration and title card are replaced by a special "Crisis on Earth-X" sequence. See more »


References Star Raiders (1979) See more »

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User Reviews

I hate crossover episodes
22 May 2019 | by Jinx-to-EnnienSee all my reviews

Since I stream this show on Netflix I don't watch the other shows involved in crossover episodes. This makes understanding what is going on impossible. I wish they would confine storylines to one episode.

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