Arrow · Season 5 · Episode 8
Invasion! (III)
Oliver wakes up to a life where he never got on The Queen’s Gambit. Robert and Moira Queen are alive and well. Laurel is his loving fiancée and their wedding is imminent. Everything seems perfect, but Oliver starts to notice small imperfections that make him question this new reality. Meanwhile, Felicity and the recruits take on a new threat with help from The Flash and Supergirl. The crossover starts on Supergirl S02E08 Medusa (I) and The Flash S03E08 Invasion! (II). It continues on DC's Legends of Tomorrow S02E07 Invasion! (IV).
Guest stars
Katie Cassidy
Laurel Lance
Rick Gonzalez
Rene Ramirez / Wild Dog
Susanna Thompson
Moira Queen
John Barrowman
Malcolm Merlyn
Neal McDonough
Damien Darhk
Joe Dinicol
Rory Regan / Ragman
Nick Zano
Nate Heywood
Jamey Sheridan
Robert Queen
Melissa Benoist
Kara Danvers / Supergirl
Carlos Valdes
Cisco Ramon
Brandon Routh
Ray Palmer
Caity Lotz
Sara Lance / White Canary