Barry (guest star Grant Gustin) and Iris's (guest star Candice Patton) wedding brings the gang together, but things go awry when villains from Earth-X attack the ceremony. All of the superheroes band together with help from their super friends like Citizen Cold (guest star Wentworth Miller), The Ray (guest star Russell Tovey), Felicity Smoak (guest star Emily Bett Rickards), Iris West and Alex Danvers (Chyler Leigh) to take on their most formidable villains yet. Earth's mightiest heroes - Green Arrow (guest star Stephen Amell), Supergirl (Melissa Benoist), The Flash (guest star Grant Gustin) and White Canary (guest star Caity Lotz) - lead their teams into battle to save the world.
Did You Know?
The Earth-X version of Adolf Hitler
died in 1994. As Hitler was born on April 20, 1889, he was either 104 or 105 years old at the time of his death. See more
Harrison Wells says that there are "53 Karas" in the multiverse, assuming that every person has a doppelganger in every Earth. This has previously been shown to not be true as Harrison's daughter, Jessie, does not have a doppelganger on Earth-1 and when Barry first arrived at Earth-38 he looked up himself and several other characters from The Flash and Arrow and found that they did not exist on Earth-38. See more
Ok, but why would Nazis from 1945 want to crash my wedding?
Crabs legs. They were delicious.
Well, Iris has a point, though. If they're out of time, they would've targeted the military or law enforcement.
Tommy was plucked from 5 years ago and put in the Prometheus wardrobe. That doesn't make any sense.
It does if we're dealing with an anachronism.
Visitors from another Earth?
Whoa. There are more than one?
There are 52, actually.
Dr. Martin Stein
Though I'm hard pressed to think of one where Nazi's are ascendant.
Dr. Harry Wells
The usual opening narration and title card are replaced by a special "Crisis on Earth-X" sequence. See more