The Flash - 'Untouchable'

This can't possibly represent any kind of traffic hazard.

A lot of this episode seems to be about asking the question: Who is faster? Who is better? Flash or Kid Flash?

Wally's speed is increasing at an exceptional rate, and honestly I'm expecting some sort of limitation or drawback to kick in any day now, since otherwise... well, what's the point of the Flash himself? In a race at the start of the episode they are now evenly matched, except that Barry is able to phase through a building instead of going around it. In a later scene, Joe is introducing his family to his girlfriend Cecile and her daughter over coffee and it turns out that the daughter is Team Kid Flash, while Cecile is old school Team Flash (only not actually Team Flash, because that's the term we use for the actual support team. You get what I'm talking about, right?)

Anyhugh, that's all beside the point(1), as a chef is found in his kitchen, horribly decayed. When a singer is similarly killed, Barry realises that both victims were members of the CCPD in Flashpoint. Julian and Caitlin discover a DNA trace including an element previously only seen in the husks left by humans transformed into their metahuman Flashpoint equivalent by Alchemy. During the process, Julian gets on Caitlin's nerves to the point that dating is almost inevitable.

This guys is sufficiently a sideshow that I'm not sure he even gets a villain
name.

Also, their DNA tests clearly register one human and one metahuman, so how come Felicity got an exact match for Earth-1 Laurel's human DNA from Earth-2's metahuman Laurel? Answer me that, Arrow!(2)

After the metahuman, the aliasless Clive Yorkin, tries to kill Joe at CC Jitters, Barry realises that he was arrested in Flashpoint and is seeking revenge on those who caught him. Cisco vibes Flashpoint to identify any other targets, one of whom is a PI in the current timeline. Yorkin brings down a mass of rubble on the track in front of a train carrying both the PI and Joe, and Barry phases the entire train through the blockage, inspiring Wally to achieve phasing to pass through Yorkin and use his blood's healing power to neutralise Yorkin's abilities, and incidentally create an antidote to administer to Iris.

Some said that Caitlin has a frosty bedside manner.

Right, yes; Iris was targeted as a means of hurting Joe. Barry pushes Caitlin to use her powers to slow the spread of the decomposing effect - because Barry can be a real douche to his friends when Iris is in danger - and Julian talks her down from going completely Killer Frost by telling her that she is stronger than he was when offered the chance to become Alchemy. She is moved, and asks him out for a drink at the end of the episode, so called that one (and in fairness, it was the not being a dick bit that moved her, as well as identifying with his guilt over having caused harm as Alchemy, although 'not being a dick' and 'feeling bad about all those murders you precipitated' should really be an absolute baseline for boyfriend material, rather than an active qualification.)

During the course of all this, Iris begins to worry that the future can't be changed - the restaurant where the first murder happened is one that was reported as having to change its name in the future vision - and Joe is let in on the fact that her time is nigh. Finally, Jesse comes back from Earth-2 to ask for help, as her father has been taken to Gorilla City by Grod(3).

'Untouchable' sidelines a decent meta of the week and a reminder of the whole Flashpoint deal in favour of a bizarre PR feud between Flash and Kid Flash which has no basis in reality (yet.) Iris swings from her assumed immortality last week to the slough of despond, and Joe continues to be baffled, his standard look this season. Caitlin/Julian (Caitlian?) isn't a bad romance, as these things go, but only if he warms up a little, because there's a level of jerk that goes beyond curmudgeonly charm and Julian is right on the edge. Savitar is, of course, still absent, and that's probably a good thing. He was much too powerful to hang around in the background; that was frankly getting a little unconvincing with Zoom.

(1) It totally isn't; if anything the horrible murders with skin being eaten are tangential to the purpose of the episode.
(2) Okay, Julian is the world's leading metahuman expert, so it's entirely possible that he has his own test that hasn't reached the public domain yet. I'll let you have this one, but someone still ought to be feeding the prisoners in the Pipeline more than once every three weeks.
(3) For which I have to wait two weeks, damnit.