Damn, this Earth-2 visit stuff is awfully cool. It's not nearly as much fun if you know what's coming, so...
It's great to finally see the Caitlin Killer Frost, and the Deathstorm Ronnie was neat, too.
Hooray for Cisco having the traditional Vibe powers! Well, his doppleganger anyway, and presumably he gets to learn eventually.
Zoom really felt dangerous in this one. Sort of hanging in the background like the bogeyman and then finally showing up at the end to wreak havoc. Love it.
Guess we know how Barry will end up visiting Supergirl, since we saw her on the way through the wormhole, and his trip home is looking a little shaky at the moment. It would be awesome if he also stopped off to see GRODD, but I'm not getting my hopes up.
I enjoyed lounge-singer Joe, at least as long as he lasted, and Detective Iris. Poor-shot Lawton made a nice side joke.
Thought the bit with Barry talking to his mom on the phone was really well done.
And back on Earth-1, they're creeping closer to Velocity 9. Will they make something special out of hitting 9, since that was the nasty drug in the comics? Maybe it'll be the version that finally gets Jay back to permanent speed.