This episode starts with Jay Garrick, the Flash of Earth 2, telling his story of how he arrived in Central City and Earth 1, Barry’s Earth. He fought Zoom when a singularity opened up. That singularity seems to be the one that we saw when the Reverse Flash was attempting to escape at the end of the last season. Zoom sends another Metahuman from Earth 2 to kill Barry. This one is Sand Demon.
Joe and Patty Spivot, a police officer trying to join Joe’s metahuman task force, find a person that they think is Sand Demon. One problem, he is the Earth 1 version of the character, therefore not a metahuman. The Earth 2 version shows up and takes Patty to trap the Flash. It takes both Jay and Barry to defeat him. During this we see more of Cisco’s predictive abilities. Professor Stein deduces the ability and talks to Cisco about it. Cisco asks that Stein keep it secret till Cisco is ready. At the end Stein collapses, and then we see another earth where the savior of Central City is Harrison Wells.
Now for the Easter eggs. Stein explains the idea of a multiverse, a concept where there are multiple universe coexisting together on other planes of reality. Before 1986 DC Comics had many of these universes. On Earth One the superheroes were young and only in business since the last 10 to 15 years. On Earth Two the superheroes were around since the 30’s and 40’s. They had aged since this was 30 to 40 years after World War II.
In 1986, during the Crisis on Infinite Earths, they merged all universes into one. In 2005 the multiverse was returned, but this time instead of an infinite number of universes there were only 52. After Flashpoint in 2011, they were reformed again as the New 52, with new versions of the 52 universes. This is why there were 52 breaches. Earth 2 in this multiverse has older versions of the big three, but the other versions of the characters are new at it. Their identities are identical to the previous Earth Two.
After Jay and Barry saved Patty, they re-created the cover for The Flash #123. This is an important milestone. The name of that issue is Flash of Two Worlds. It is the introduction of the DC multiverse and the concepts of Earth One and Earth Two.
Sand Demon AKA Edward Slick was a Firestorm villain from the 1980’s. He was introduced in 1985 in Firestorm vol. 2 #51 and died in Firestorm vol. 2 #75. When he was finally defeated, it was similar to the way he was defeated in this episode.
This was a wonderful episode. They tried their best to explain the multiverse, Joe could not grasp it. Joe was a stand in for part of the audience who may not understand it, but still just go with it. Once again the show knows some of the concepts may be hard to swallow. This show does everything with a straight face, but does not shy from the absurdity inherent in the superhero genre. The Easter eggs were wonderful. Overall I give this an A.