Barry and Iris, with the Crisis behind them, look forward to a romantic Valentine's Day, only to be interrupted by the return of Amunet Black. Along the way, Barry begins to sense some very dark, foreboding changes surrounding his wife. Meanwhile, Frost spends her first Valentine's Day playing matchmaker with a forlorn Allegra.
- Ambiguously Evil: Iris's doppelganger is certainly a lot more morally shady than she is (smashing a bottle over a bar goon's head and pulling a Bed Trick on Barry, for instance), but her actual agenda, assuming she has one, is unclear.
- Amicable Exes: Allegra and her ex-boyfriend Emerson reconnect, but only as friends, and both seem to be happy with this turn of events.
- And I Must Scream: The real Iris is trapped inside a mirror dimension with no way out and nobody sans her evil doppelganger seeing or hearing her.
- Applied Phlebotinum: Rappaccini's Daughter, a rare flower that only blossoms every 25 years and whose pollen can be synthesized into a telepathic narcotic.
- A-Team Firing: See Imperial Stormtrooper Marksmanship Academy below. Amunet even insults Goldface as a "cheap, bald Mister T".
- Bed Trick: What the impostor essentially does to Barry.
- Belligerent Sexual Tension: Amunet and Goldface spend most of the episode firing insults at each other, but as the ending shows, they're in no way unattracted to one another.
- Blackmail: Amunet forces Barry to let her roam about, as she would expose his secret identity again.
- Brain Bleach: When Amunet and Goldface make up and make out, Barry and fake Iris get grossed out. Barry even says that he can't unsee it.
- The Bus Came Back: Amunet Black returns to Central City to give Team Flash some hell. Goldface also returns, having not been seen since his lone appearance last season.
- Butt-Monkey: A lone security guard is not only totally ignored while Amunet and Goldface bicker, but he ends up with his leg caught under a enormous metal ball.
- Call-Back: Seeing that "Iris" made pancakes, Barry notes "this isn't a banana", referencing the real Iris' attempt at making pancakes last season, where, after tasting the results herself, deciding to "make" Barry a banana instead.
- Color-Coded for Your Convenience: We've gone full-on 80s G.I. Joe, with all of Amunet's crew's weapons firing blue blasts while all of Goldface's crew use red.
- Does This Remind You of Anything?: Allegra's nervousness to tell her ex she's a meta is an obvious allegory for the fear of someone's loved ones rejecting them for coming out of the closet.
- Drowning My Sorrows: Frost, after her attempt to help Allegra with her ex fails. Nash helps her snap out of it.
- Evil vs. Evil: Amunet Black and Goldface fight each other throughout the episode, before they make up at the climax.
- Fantastic Racism: Allegra "ghosted" her ex-boyfriend Emerson because she was worried about how he'd react to her being a metahuman. Fortunately, once she finally told him, he had no problem with it. His band even had a new drummer that had luminescent powers.
- Foreshadowing: The revelation that this is a "mirror Iris" is hinted at in various turns: She has no problem spending money on a new juicer; she now speaks Italian; she can easily fit in a club of criminals with a harsh attitude; she's willing to violate Barry's privacy to read his mind; and, most importantly of all...her cooking is delicious.
- Get Over Here: Amunet forms a metal staff, which Goldface entangles with his Chain Pain and the two keep pulling each other closer.
- Go-Karting with Bowser: Amunet pours her heart out to Iris on her backstory with Goldface. Later, Barry tries to get the two of them to patch up.
- Gone Horribly Right: Amunet and Goldface both intended to use the flower to read minds (and its criminal applications). Barry and Iris use it on the two villains themselves, causing them to read each other's minds and make up.
- Grievous Bottley Harm: Mirror Iris attacks one of Amunet's henchmen with a bottle instead of using the safe word to make Barry appear.
- Head-Tiltingly Kinky: Whatever Amunet and Goldface end up doing during their makeup make-out session, this is Iris and Barry's reaction to seeing it.
- I Just Want to Be Normal: The reason Allegra broke up with (or rather, completely ghosted) her ex-boyfriend Emerson is because she hated being a metahuman and was afraid on how he'd react to it.
- Impaled with Extreme Prejudice: Amunet impales Barry on the shoulders with two metal spikes. Although he quickly phases through it, he was still feeling pain from it.
- Imperial Stormtrooper Marksmanship Academy: In the final battle between Amunet and Goldface, and Barry and Iris' discussion of what to do about it, the two villains' Mooks are firing at each other the entire time. Nobody hits anybody.
- It's Personal: Between Goldface and Amunet, it becomes clear very quick that it's not just a simple gang war, they want to hurt each other personally due to their mutual past.
- Lethal Chef: The real Iris's less then stellar cooking skills are brought up again as Barry is extremely surprised when his Valentine’s Day breakfast, made by Iris’s doppelgänger, is competently made and delicious.
- Let Me Get This Straight...: Amunet is obviously very suspicious when Iris offers her to help find Rappaccini's Daughter.
- Luke, I Might Be Your Father: Between Nash's photo from the previous episode and Frost remarking that his advice to Allegra was "parental", there's a heavy implication that he had a daughter that was a doppelganger of Allegra.
- The Matchmaker: Frost tries to help Allegra reconnect with a lost love. And later in the episode, Barry and fake Iris essentially do the same for Amunet and Goldface to stop their war.
- Meaningful Echo: Nash tells Frost that things aren't always black and white. She later uses the same reasoning to convince Allegra to speak to her ex-boyfriend Emerson and give him a chance to react to her being a metahuman himself, instead of just assuming his reaction.
- Mob War: A mostly offscreen one, as Amunet and Goldface's gangs go to war with each other as an extension of their lovers' spat.
- No Social Skills: Frost laments still not functioning properly around people, but Nash encourages her.
- Not Herself: Whatever happened with the Mirror that night, Iris has been changed, and to Barry's fear, not for the better. As it turns out, she is really an impostor while the real Iris is trapped in a mirror dimension.
- Product Placement: Barry's got an Amazon Alexa.
- Properly Paranoid: Turns out Barry's initial fear was right - Iris really is Not Herself.
- Revealing Hug: The impostor gives Iris a Kubrick Stare while hugging Barry.
- Shout-Out:
- The title comes from the 1983 Pat Benatar song, which also plays during the climax.
- Goldface at one point says "Bye Felicia!"
- Skewed Priorities: Amunet and Goldface spend their first confrontation fiercely arguing...about the fact that Amunet stole Goldface's vinyl records when they broke up. They go on to spend the climax taking verbal potshots at each other about their relationship in the middle of a firefight.
- Superdickery: Trailers for the second part of Season 6 teased Iris as becoming more confrontational, but the Iris of the trailers is revealed to be not the real one.
- Took a Level in Jerkass: Iris is much more confrontational towards her husband after the Mirror Incident. Subverted, because the real Iris is trapped in a mirror dimension and the Iris there is impersonating her.
- Unholy Matrimony: Goldface and Amunet Black used to be a team.
- Valentine's Day Episodes: This episode's theme.
- Wham Shot:
- Nash has a brief glimpse of Harry at CC Jitters before the latter vanishes.
- We see Iris trapped in the mirror as Barry and a villainous lookalike embrace.
- What the Hell, Hero?: The Iris impostor calls Barry out on always wanting to keep her out of any potential danger.
- You Are Better Than You Think You Are: Joe encourages Barry when the latter thinks that he and Iris are growing apart.
