The CW has aired a new promo for "DC's Legends of Tomorrow" that dives further into the team's origin, as it shows Rip Hunter consulting with the Time Masters about the threat of Vandal Savage.

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Premiering Thursday, January 21, "Legends of Tomorrow" stars Caity Lotz as White Canary, Brandon Routh as the Atom, Wentworth Miller as Leonard Snart/Captain Cold, Dominic Purcell as Mick Rory/Heat Wave, Victor Garber as Professor Martin Stein (one-half of Firestorm), Franz Drameh as Jefferson "Jax" Jackson (the other half of Firestorm), Ciara Renee as Hawkgirl and Arthur Darvill as time-traveler Rip Hunter. Stephen Amell and Grant Gustin will appear as Arrow and The Flash.