While DC Comics is having difficulty getting their act together on the silver screen, their television properties are coming up all aces. The CW Network’s yearly crossover event premiered last week as Crisis on Earth-X saw the heroes from all four “Arrowverse” televisions shows, do battle with Nazis from Earth-X.
A little history lesson. There are 52 versions of Earth in the multiverse. The heroes from Arrow, Flash, and Legends reside on Earth 1 while the crew from Supergirl live on Earth 38. Interdimensional travel called breaches allow the heroes to travel in between parallel Earths where they sometimes meet different versions of themselves aka doppelgangers.