S2, E1: In the season premiere, Nate seeks out Oliver Queen (guest star STEPHEN AMELL) for help in finding the scattered Legends, after making a shocking discovery. Once reunited, the Legends continue their new mission to protect the timeline from temporal aberrations - unusual changes to history that spawn potentially catastrophic consequences. Their first stop is 1942 to protect Albert Einstein (guest star JOHN RUBINSTEIN) from being kidnapped before the Nazis destroy New York City with a nuclear bomb. Meanwhile, Ray notices that Sara has a mission of her own, which leads them both to face her nemesis, Damien Darhk (recurring guest star NEAL MCDONOUGH).