Welcome to Earth-2

"So which one of you lounge lizards is in the wrong universe?"

- Caitlin questioning the people of Earth Two in Jitterbugs "Welcome to Earth-2" is the thirteenth episode of the second season of The Flash, and the thirty-sixth episode overall. It aired on February 9, 2016. It is the first half of a two-parter.

Synopsis
Barry, Wells and Cisco journey to Earth-2 to rescue Wells' daughter, Jesse, from Zoom. Barry is stunned when he runs into Earth-2 Iris and Joe, but nothing prepares him for meeting Killer Frost and Deathstorm. Meanwhile, back on Earth-1, Jay has to take over the Flash's responsibilities when a meta-human nicknamed Geomancer attacks Central City.

Trivia

 * During Barry, Cisco and Earth-2 Harrison Wells' travel to Earth-2, they see in the dimension stream several cameos:
 * Alternate Green Arrow, possibly Connor Hawke (who is set to appear in a future episode) or Oliver Queen in, the upcoming sixth episode of DC's Legends of Tomorrow)
 * The Flash from the 1990s CBS The Flash series, portrayed by John Wesley Shipp. Interesting fact is that the emblem of this Flash's suit is backward, much like the ones of Eobard Thawne and Zoom
 * Supergirl from the CBS TV series Supergirl (a reference to Barry's future appearance on her show)
 * Grodd, a former resident of Earth One deported to Earth Two by Team Flash
 * Jonah Hex, an old west gunslinger (a reference to his future appearance in DC's Legends of Tomorrow)
 * Legion flight ring used by the Legion of Super-Heroes from the 30th century in the comics
 * Below "Dad" and "Mom & Dad" the names "Eddie", "Bruce", "Hal" and "Diana" appear as speed dial options on the telephone at Earth-2 Barry and Iris' house. The first may refer to Eddie Thawne. In the comics, Bruce Wayne is the alter ego of Batman, Hal Jordan is the alter-ego of the second Green Lantern, Diana Prince is the alter ego of Wonder Woman. They and Barry (along with Superman, Aquaman and Martian Manhunter) were founding members of the Justice League in the 1960 comic The Brave and the Bold #28.
 * The mural in the Earth 2 Central City Police Department says a free and just society. This is a reference to the Justice Society which Jay Garrick is a member of in the comics.