The Flash Season 4 Episode 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).
Guest Stars
Emily Bett Rickards
Felicity Smoak
Dominic Purcell
Mick Rory / Heat Wave
Franz Drameh
Jefferson 'Jax' Jackson / Firestorm
Jeremy Jordan
Winn Schott
Russell Tovey
Ray Terrill / The Ray