News & Spoilers
THE ELSEWORLDS CROSSOVER CONTINUES IN GOTHAM CITY WITH BATWOMAN (RUBY ROSE)
With Oliver (Stephen Amell) and Barry (guest star Grant Gustin) still stuck in the other's bodies, the two get a lead on John Deegan (guest star Jeremy Davies) and head to Gotham City with Supergirl (guest star Melissa Benoist) to figure out why their reality has changed. While there, they meet the mysterious Kate Kane (guest star Ruby Rose) who provides them with information that leads the group to Arkham Asylum.
James Bamford directed the episode with teleplay by Marc Guggenheim and story by Caroline Dries (#709).