With Astra, Spooner and a now-human Gideon trying to save the Legends, Gideon becomes overwhelmed by her new human choices sending her into a catatonic state. Astra and Spooner combine their powers to enter Gideon's mindscape and discover that a viru... (more)s is trying to erase all of Gideon's memories. Acting fast, they devise a plan to defeat the virus before it's too late. Meanwhile, the Legends are about to go up against a powerful new foe.

Arthur Darvill, Brandon Routh, Courtney Ford, Falk Hentschel, Franz Drameh, Raffi Barsoumian, Victor Garber, Wentworth Miller