The CW network has released a synopsis for the second season premiere of its superhero ensemble show "Legends of Tomorrow." The synopsis clarifies "Arrow" lead Stephen Amell's presence in the premiere, while also setting the stage for the second season's major conflict.

Fans rightly questioned if Amell's Green Arrow would be joining the "Legends of Tomorrow" team when promotional images included him in their ranks. According to a report from ComicBookMovie.com, while the superhero bowman will be working closely with the Legends, it will be in an ancillary role.

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The synopsis also reveals the nature of the team's first jump back into the annals of time, starting off with a trip to save a notable World War II scientist. The season will also see a guest appearance by one classic "Arrow" villain -- Damien Darhk.

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.

"Legends of Tomorrow" returns for its second season on Thursday, October 13, at 8pm ET on the CW.