The Flash - Season 4 - Eps 8: Crisis on Earth-X (III)
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. The crossover starts on Supergirl S03E08 Crisis on Earth X (I) and Arrow S06E08 Crisis on Earth X (II). It continues on DC's Legends of Tomorrow S03E08 Crisis on Earth X (IV).
About The Flash

Title: The Flash
First Air Date: 2014-10-07
Last Air Date: 2023-05-24
Status: Ended
Rating: 7.8/10 (from 11226 votes)
Language: EN
Seasons: 10
Total Episodes: 184
Network: The CW
Genres: Drama, Sci-Fi & Fantasy
Production Companies: Warner Bros. Television, Berlanti Productions, DC Entertainment
Synopsis
After being struck by lightning, CSI investigator Barry Allen awakens from a nine-month coma to discover he has been granted the gift of super speed. Teaming up with S.T.A.R. Labs, Barry takes on the persona of The Flash, the Fastest Man Alive, to protect his city.
Cast

Grant Gustin
Barry Allen / The Flash

Candice Patton
Iris West-Allen

Danielle Panabaker
Khione

Danielle Nicolet
Cecile Horton

Kayla Compton
Allegra Garcia

Brandon McKnight
Chester P. Runk

Jon Cor
Mark Blaine / Chillblaine