Crisis on Earth-X


 * For the titular event, see Earth-X Invasion (Pre-Crisis).

"Failure's not an option. Losing is not an option. We are gonna win. And we are gonna show these people that this earth belongs to us."

- Green Arrow's speech

Crisis on Earth-X is the name of the fourth Arrowverse crossover between, , ​​​​​ and. It began November 27, 2017, and finished on November 28, 2017.

Synopsis
Barry and Iris's 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, The Ray, Felicity Smoak, Iris West and Alex Danvers to take on their most formidable villains yet. Earth's mightiest heroes - Green Arrow, Supergirl, The Flash and White Canary - lead their teams into battle to save the world.

Cast

 * Melissa Benoist as Supergirl (Kara Danvers) / Overgirl (Kara Zor-El)
 * Mehcad Brooks as Guardian (James Olsen)
 * Chyler Leigh as Alex Danvers
 * Jeremy Jordan as Winn Schott / Winn Schott
 * Chris Wood as Mon-El
 * David Harewood as J'onn J'onzz
 * Stephen Amell as Green Arrow (Oliver Queen) / Dark Arrow (Oliver Queen)
 * Emily Bett Rickards as Overwatch (Felicity Smoak) / Felicity
 * Echo Kellum as Mister Terrific (Curtis Holt)
 * Rick Gonzalez as Wild Dog (Rene Ramirez)
 * Juliana Harkavy as Black Canary (Dinah Drake)
 * Grant Gustin as The Flash (Barry Allen)
 * Candice Patton as Iris West
 * Danielle Panabaker as Killer Frost (Caitlin Snow)
 * Carlos Valdes as Vibe (Cisco Ramon)
 * Tom Cavanagh as Reverse-Flash/Dark Flash/Harrison Wells (Eobard Thawne) / Harry Wells
 * Victor Garber as Firestorm (Martin Stein)
 * Brandon Routh as Atom (Ray Palmer)
 * Caity Lotz as White Canary (Sara Lance)
 * Franz Drameh as Firestorm (Jefferson Jackson)
 * Maisie Richardson-Sellers as Vixen (Amaya Jiwe)
 * Amy Louise Pemberton as Gideon
 * Tala Ashe as Zari Tomaz
 * Nick Zano as Steel (Nate Heywood)
 * Dominic Purcell as Heat Wave (Mick Rory)
 * Jesse L. Martin as Joe West
 * Keiynan Lonsdale as Wally West
 * Colin Donnell as Prometheus (Tommy Merlyn)
 * Paul Blackthorne as Sturmbannführer (Quentin Lance)
 * David Ramsey as John Diggle
 * Jessica Parker Kennedy as Nora West-Allen
 * Wentworth Miller as Citizen Cold (Leo Snart)
 * Danielle Nicolet as Cecile Horton
 * Patrick Sabongui as David Singh
 * Christina Brucato as Lily Stein
 * Isabella Hofmann as Clarissa Stein
 * William Katt as Minister
 * Russell Tovey as The Ray (Ray Terrill)
 * Anthony Ames as Angry Boss
 * Robyn Bradley as Wedding Planner
 * Mackenzie Gray as Greggor
 * Paul Herbert as Scientist
 * Jay MacDougald as Guard
 * Andrea Pizarro as Manicurist
 * Jeremy Schuetze as Rob
 * Chris Walters as Norman Guard
 * Brian Cook as Nazi
 * Brett Davidson as Nazi Facility Guard
 * Frederick Schmidt as Metallo-X
 * Micah Steinke as Nazi Soldier #1
 * Charles Zuckermann as Nazi Commander
 * Adam Klassen as Nazi Navigator
 * Michael Dorn as Prometheus (Tommy Merlyn)
 * Susanna Thompson as Wellenreiter A.I.