Arrow (2012)

S7E9 Elseworlds (II)

Oliver and Barry remain trapped in each other’s bodies as they follow a lead on John Deegan, prompting them to travel to Gotham City with Supergirl in search of answers about their altered reality. In Gotham, they encounter the enigmatic Kate Kane, who offers them crucial information that directs them to Arkham Asylum. This crossover event kicks off in The Flash S05E09 Elseworlds (I) and wraps up in Supergirl S04E09 Elseworlds (III).