Ralph comes face to face with Sue Dearbon, the woman he's been searching the past few months for. Meanwhile, Iris desperately seeks to escape the mirror world and help Barry.
- Action Girl: Sue Dearbon.
- Air-Vent Passageway: Sort of; Ralph escapes the vault he was trapped in by going through a small pipe.
- And I Must Scream: Iris is still trapped in the mirror dimension, and only her reflection knows of her imprisonment. Even more so with Eva as she's been in the dimension alone for a little over 6 years, since the accelerator explosion.
- Big Damn Heroes: The Flash & CCPD arrive as back-up for Ralph as Loring & his goons get ready to open fire on a weakened Elongated Man.
- Birds of a Feather: Ralph and Sue...at least until the latter drops the mask.
- Bitch in Sheep's Clothing: Combined with Master Actress. Sue's act was so convincing that Ralph never saw it coming, and Cecile the resident empath never reads her intentions.
- Brick Joke: Ralph and Sue have to disguise themselves in order to break into a bank, disguised as Joe West (again) and a random policewoman respectively, before Sue knocks the bank manager out. When all the trouble dies down and CCPD arrives to arrest Loring and his goons, the bank manager tries to accuse the real Joe before things were cleared up.
- The Cameo: Lena, Lex, Kara and Alex appear on the Catco magazine cover.
- Casual Danger Dialogue: Ralph and Sue chat throughout the episode, even when being shot at.
- Continuity Nod:
- Barry and Iris discuss the latest Catco magazine issue whose cover story is "Lex Luthor Wins Man of Tomorrow Award".
- Iris tells Eva about Sam Scudder, the last meta Team Flash encountered with mirror-related abilities.
- The Iris doppelganger is after the mirror gun Nora stole from McCulloch Tech back in Season 5.
- A Day in the Limelight: The episode focuses on Ralph and the new character, Sue Dearbon.
- Designated Girl Fight: After Ultraviolet takes Ralph out of commission temporarily, she and Sue end up in a martial arts fight.
- Dramatic Irony: Barry telling Ralph he can't beat himself up about Sue as "we've all trusted the wrong person, I know I have." He then hands the Mirror Gun to the Mirror Iris, unaware she's not his wife.
- "Eureka!" Moment: Iris recalling using extremely cold temperatures to free someone from a mirror prison is what snaps Eva out of her melancholy.
- Five-Second Foreshadowing: Ralph takes notice of how the box supposedly containing Loring's ledger is rather small, right before Sue reveals her true intentions.
- Forgot About His Powers: How somebody as elastic and durable as Ralph could be punched out by some random Mook is anybody's guess.
- Go Mad from the Isolation: Eva, or at least she is teetering on the edge of madness.
- Heroic BSoD: After being played by Sue, Ralph is left upset with himself for not realizing the truth. Mirror Iris comments that it'll take him a while to bounce back from it.
- Hope Spot:
- Iris suggests trying the method Frost secretly used to free Barry from Sam Scudder's mirror trap back in Season 3. It only shattered the mirror she and Eva were using.
- When John's goons suddenly stop firing at Ralph and Sue, they think The Cavalry has arrived. It was actually Ultraviolet who proceeds to fight Sue.
- It looked like Barry is seeing something in his mirror, around the same time the real Iris is staring back at him, but he just dismisses it in the end.
- I See Dead People: Nash is being haunted by Harry.
- It's All My Fault: Ralph is extremely angry at himself for having not seen Sue for what she really is. Barry tries to cheer him up by saying that he too had faith in the wrong people in the past.
- I Work Alone: Ralph turns down Cecile's offer to help him find Sue Dearbon.
- Latex Perfection: Sue disguises herself as a bank security guard this way. This marks the trope's first appearance on The Flash, though it has appeared before on Arrow (thanks to Human Target) and most recently on Batwoman (2019).
- Let's Fight Like Gentlemen: Ultraviolet refrains from using her powers and fights Sue hand-to-hand.
- Madness Mantra: Eva keeps muttering "1322". This is the number of failed attempts she tried to escape the Mirror World.
- Make It Look Like an Accident: Apparently, there is a mole in the CCPD who covered up a lot of "accidents" related to Joseph Carver.
- Mythology Gag:
- Ralph and Sue's relationship strongly mirrors that of Batman and Catwoman. Particularly highlighted by Sue's cat-burglar outfit.
- Sue's supposed ex, who she falsely claims is out for her head in this episode, is named John Loring. This is a clear nod to Jean Loring, Ray Palmer's then-wife in the comics, who murdered Sue and kickstarted the entire Identity Crisis (2004) storyline.
- The "Man of Tomorrow" award that Lex is shown to have won is one of Superman's nicknames.
- Nice Job Breaking It, Hero: Ralph ends up revealing his superhero identity to a thief, who now has leverage against him.
- The Nicknamer: Sue calls Ralph "Slick".
- Seen It All: While Eva is amazed about her powers, for Iris it doesn't even come close to the strangest she has seen.
- Shipper on Deck: Cecile is giddy on seeing Ralph and Sue together, as they perfectly match.
- Shout-Out: The title is a reference to the song "A Boy Named Sue".
- Taking the Bullet: Ralph dives into the path of Ultraviolet's attack to shield the hapless bank manager.
- Unusually Uninteresting Sight: Sue seems downright casual about being hunted by a dangerous crime boss - makes sense, since she told Ralph lies, as is revealed later.
- Was It All a Lie?: Ralph asks Sue this after she reveals herself to be a thief. She answers by cryptically saying "Yes. And no."
- Wham Line:
- In this case, not the line itself, but the fact that the Harry "illusion" invisible to anyone but Nash can actually talk.
- When Sue locks Ralph up in the vault...
Ralph: We are this close to getting the goods on Loring!Sue: Who cares about Loring? I never met the guy. - You Are Better Than You Think You Are: Iris encourages Eva to use her newfound powers to re-assemble the mirror, which she does.
