Part 1 of a four part crossover event begins on the Supergirl episode airing November 27.

The episode is titled “Crisis on Earth-X” Here is the synopsis from TV Guide: “Part 1 of 4. Barry and Iris’s wedding brings the gang together, but things go awry when villains from Earth-X attack the ceremony. All of the superheroes join forces to take on their most formidable villains yet. Earth’s mightiest heroes–Green Arrow, Supergirl, The Flash and White Canary–lead their teams into battle to save the world.”

Don’t miss Part 1 of the crossover event “Crisis on Earth-X” airing on Supergirl on Monday, November 27 at 8/7c on The CW.

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