Supergirl Season 4 Episode 9
Supergirl, The Flash, Green Arrow and Superman engage in the battle of their lives. The crossover starts on The Flash S05E09 Elseworlds (I) and Arrow S07E09 Elseworlds (II).
Serie: Supergirl
Director: Jesse Warn
Guest Star: Bitsie Tulloch, Bob Frazer, Carlos Valdes, Danielle Panabaker, David Ramsey, Grant Gustin, Jeremy Davies, John Wesley Shipp, LaMonica Garrett, Ruby Rose, Stephen Amell, Tyler Hoechlin