The CW has released a trailer for Part Two of the two-part Arrow and The Flash crossover event: "Legends of Yesterday," which will lay the groundwork for DC's Legends of Tomorrow.

PART TWO OF THE EPIC CROSSOVER WITH “THE FLASH” — Oliver (Stephen Amell) and Barry Allen (guest star Grant Gustin) take Kendra Saunders (guest star Ciara Renée) and Carter Hall (guest star Falk Henstchel) to a remote location to keep them hidden from Vandal Savage (guest star Casper Crump) while they figure out how to defeat him. Malcolm (John Barrowman) arranges a meeting between Vandal, Green Arrow and The Flash that doesn’t go as planned. Meanwhile, Felicity (Emily Bett Rickards), Thea (Willa Holland), Diggle (David Ramsey) and Laurel (Katie Cassidy) work with Team Flash to come up with a weapon powerful enough to destroy Vandal Savage.

Check out the sneak preview in the video below.

Thor Freudenthal directed the episode with story by Greg Berlanti and Marc Guggenheim and teleplay by Brian Ford Sullivan and Marc Guggenheim.

Part 2 of "Legends of Yesterday" will air Wednesday, December 2 at 8PM on The CW.