Legends of Tomorrow: Crisis on Earth X, Part 4

Part four of Crisis on Earth X jumps in exactly where part three ended, as Legends of Tomorrow finishes the team-up.

Flash: Crisis on Earth X, Part 3

The big crossover, Crisis on Earth X, continues in its third part on Flash. Several of the heroes are in what appears to be a concentration camp, and things are looking grim.

Arrow: Crisis On Earth X, Part 2

The Crisis on Earth X continues with part two, as Arrow shifts to another night for the fun. Part one ended with Prometheus held captive in the Pipeline, pulling his mask off.

Supergirl: Crisis On Earth X, Part 1

Last year, the big CW-verse crossover was about aliens attacking. This time, the threat comes from somewhere else. Last year, they also made the Supergirl episode barely a part of it, and they fix that this time around.