When "DC's Legends of Tomorrow" returns tonight for its second season, the heroes will not only be meeting the new face of Dr. Nate Heywood (Nick Zano), but also world-famous physicist Albert Einstein. The Legends will meet the Theory of Relativity creator when Nazis threaten to kidnap him in the 1940s.

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In the clip below, Dr. Stein and Heatwave talk to Einstein, who is waking up from a nap in the Waverider containment cell. While the German physicist doesn't understand what's happening at first, he quickly figures out he's in the presence of time travelers.

LOST AND FOUND — GUEST STARRING STEPHEN AMELL — After the defeat of the immortal villain Vandal Savage and the exposure of the corrupt Time Masters, a new threat emerges. Dr. Nate Heywood (Nick Zano), an unconventional and charming historian, is thrust into the action. After making a shocking discovery, Nate seeks out Oliver Queen (guest star Stephen Amell) for help in finding the scattered Legends. 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 from being kidnapped before the Nazis destroy New York City with a nuclear bomb. Meanwhile, Ray (Brandon Routh) notices that Sara (Caity Lotz) has a mission of her own, which leads them both to face her nemesis, Damien Darhk (guest star Neal McDonough). Victor Garber, Arthur Darvill, Dominic Purcell and Franz Drameh also star. Dermot Downs directed the episode written by Marc Guggenheim & Phil Klemmer and Greg Berlanti & Chris Fedak.

Airing Thursdays at 8 pm ET/PT on The CW, "DC's Legends of Tomorrow" stars Arthur Darvill as Rip Hunter, Brandon Routh as the Atom, Victor Garber and Franz Drameh as Firestorm, Caity Lotz as White Canary, Maisie Richardson-Seller as Vixen, Dominic Purcell as Heatwave and Nick Zano as Citizen Steel.