Next week sees the big CW DC Invasion crossover kick off with Supergirl, but if you watched last week's episode of DC's Legends of Tomorrow, the crossover actually begins at the end of the episode.
Just about every episode this season for DC's Legends of Tomorrow features a cliffhanger, such as the reveal of the Reverse Flash, and last week's was no different — and it featured two.
The first kicker revealed Citizen Steel's new costume, designed by Ray Palmer, and the second features White Canary barging in on them to tell them their friends back in 2016 need their help. We can guess from that scene, that someone from 2016 contacts the Legends for assistance as the Dominators make war with the metahumans, or even that a time quake goes off leading the Legends to investigate.
It will also be interesting to see the Legends interacting with The Flash, as the Legends finally discovered a speedster (unknown to them it's the Reverse Flash) has been the cause of all the time disruptions this season. The Legends also received a message from Barry in the future which could play into things, and recently has also seen Professor Stein having flashbacks to memories he never had before.
The DC's Legends of Tomorrow Invasion Episode airs Thursday, December 1st at 8pm ET on The CW.