Welcome to Earth-2 was a damn good and a damn fun episode to watch. This is the kind of crossover, comic booky story I want to see more of. Having Barry, Cisco and Harry heading to Earth-2 opened up a lot of things. So far we have only experienced the fish-out-of-water angle through the eyes of Harry and Jay. But that hasn't been the same because they are on Earth-1, with nothing changing. But put the characters into Earth-2, thus taking the viewer along for the ride really sells it. All the bad guys from Earth 1 are now good guys on Earth 2, and more deliscious was seeing all the good guys and gals turned evil. Seeing Caitlin, Cisco and Ronnie as Killer Frost, Reverb and Deathstorm was fantastic. The episode had a very good balance between laugh out loud funny moments and teary-eyed poignancy. I'm glad this will go for another episode. Loved the breach at the start of the episode. When you go through it, you "see" alternate things that will happen in the future. The images whiz by so fast and are so distorted, it's hard to make out most of them. But the one thing that I saw as clear as the blue sky was Supergirl (Melissa Benoist). This had me grinning.