Last night's episode of “Legends of Tomorrow” gave us some serious shocks as we learned some sinister secrets regarding Damien Darhk and the Reverse Flash. Thanks to a new promo and synopsis from the CW, which you can see below, we learned that the next episode promises to give us some great moments as well. Most importantly -- it appears that the Justice Society of America is set to make their big, action-packed debut.

After briefly teasing them last season, the JSA is finally set to make their debut in the time traveling show, and we couldn’t be more excited. Check out the full synopsis below:

The Legends travel to Nazi-occupied Paris, but find themselves surrounded by the Justice Society of America (AKA JSA.) The Legends discover a time aberration that threatens the JSA, but the JSA wants nothing to do with them or their help. Nevertheless, the Legends force their way into the JSA’s mission to intercept and seize a mysterious package. Nate (Nick Zano) is desperate to prove that he should be part of the team, but he has a secret that he shares with his grandfather Commander Steel (Matthew MacCaull) that might make it difficult. Ray (Brandon Routh) is so focused on impressing the JSA, he puts himself and Vixen (Maisie Richardson-Sellers) in danger. Meanwhile, Stein (Victor Garber) has stepped in as the leader with Rip (Arthur Darvill) gone, but when decisions aren’t being made Sara (Caity Lotz) seems to be the one calling the shots. Dominic Purcell and Franz Drameh also star. Michael Grossman directed the episode written by Chris Fedak & Sarah Nicole Jones.

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.