In next week's midseason finale of "DC's Legends of Tomorrow," the Waverider crew travels to 1927 Chicago, where they meet Al Capone and some unexpected friends.

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In this promo for the episode, titled "The Chicago Way," Damien Darhk, Malcolm Merlyn and Eobard Thawne make a deal with the infamous mobster. But as the Legends try to keep Capone's original timeline intact, they're confronted by a surprise guest -- Captain Cold.

LEGION OF DOOM – When a new Time Aberration is discovered by the Legends, they find themselves headed to 1927 Chicago. The Legends quickly realize that they have been set up by Eobard Thawne (guest star Matt Letscher), Damien Darhk (guest star Neal McDonough) and the newest member of the Legion of Doom, Malcolm Merlyn (guest start John Barrowman). While everyone is trying to help fix what they think is the mission, Jax (Franz Drameh) encourages a reluctant Stein (Victor Garber) to share his secret with the other Legends. Stein is taken captive and Sara (Caity Lotz) must make the tough choice of either stopping the Legion of Doom or saving Stein. Meanwhile, Rory (Dominic Purcell) gets an unexpected visitor and is not sure how to handle it. Brandon Routh, Nick Zano and Maisie Richardson-Sellers also star. Ralph Hemecker directed the episode written by Sarah Nicole Jones & Ray Utarnachitt (#208). Original airdate 12/8/2016.

Airing Thursdays at 8 p.m. 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.