The Flash - 'The Darkness and the Light'

"There. Sure glad I don't look stupid in this."

And lo, it came to pass that another metahuman villain got chucked at the Flash through the Breach. This time, it's Doctor Light, the Earth-2 Linda Park and a cross between the villainous and heroic Doctors Light in the comics.

Jay Garrick insists that Light isn't a killer and can be reasoned with, while Earth-2 Harrison Wells - dubbed 'Harry' by the team - is just as insistent that anyone sent by Zoom needs to be taken out hard. Much is made of the conflict between Harry and Jay in this episode, with Harry apparently overcompensating for not facing up to his responsibility for the existence of metas in Earth-2 and angry as hell at Jay for not taking out Zoom (who, it is small surprise to see in the stinger, has kidnapped Harry's daughter.) Harry wants Barry to take out Zoom; Jay thinks that he isn't ready.

Barry tries to talk to Light, especially when he realises she is his ex-girlfriend's double, but letting that slip prompts her to go after Linda Park, intending to replace her in order to hide from Zoom (who will clearly not realise the switch has been made if Light burns Park to a crisp in front of her friends and co-workers. Light ends up in the Pipeline, because we're still using the illegal black site, but not before she kills someone, to Barry and Jay's horror.

Yeah... I got nothin'. I wish I hadn't used the MST3K joke on
Light's helmet now.

Barry goes on a literal blind date with Patty, having been dazzled by Light's powers, but it's nice to see that a) he turns up instead of crying off and b) she works it out. While the devaluing of secret identities is a bit of a running gag in the Arrowverse, I hope that Patty isn't kept in the dark for too long, because I don't want to go through another 'you kept secrets from me' episode. We get enough of that in Arrow.

Harry also outs Cisco as a metahuman using his meta-detecting watch, leading Barry and Caitlin to dub him 'Vibe'. Despite the Killer Frost rumours, Caitlin is not yet registering as meta. Getting to use his powers for good (to track Light) gives Cisco the confidence boost to chat up the new barista at CC Jitters without sounding like a creepy stalker, and he actually gets the phone number for Kendra Saunders... the future Hawkgirl.