After Iris's erratic behavior, Barry finally begins to realize that she is an impostor. Barry finally comes face to face with Mirror Iris's true form.
- Abusive Parents: The Reflections refer to Eva as their mother, but Eva forces Mirror Kamilla to sacrifice her life. Mirror Iris is visibly disturbed by this act.
- Alas, Poor Villain: Mirror Iris starts to become more sentient, leading to her betray her boss, who immediately unmakes her. Her first independent decision was her last.Mirror Iris: Find her Barry, find Iris.
(Barry cradles her in his arms)
Mirror Iris: I feel alive...
(she shatters to pieces) - Apologetic Attacker: Eva actually does seem to genuinely apologize for everything that happened to Barry, due to her being mentally fragile.
- Arbitrary Skepticism: Cecile is initially not convinced that Iris has been replaced by an impostor.
- Back from the Dead: Barry mentions in passing that Hannibal Bates/Everyman is alive again post-Crisis.
- The Bad Guy Wins: Eva manages to escape the Mirror World without a cinch.
- Bed Trick: Mirror Iris confirms that she and Barry indeed shared a bed.
- The Bus Came Back:
- Caitlin, explained by having her be sick from Sunshine's attack this whole time.
- The Reflections visit Bloodwork at A.R.G.U.S. to obtain a sample of his blood that will help set Eva free.
- Character Death: Both Mirror Kamilla and Mirror Iris die in this episode. Mirror Singh ultimately survives, even if he is roughed up a bit by Ramsey.
- Continuity Nod: Barry refers to several ways a person can look like someone else, based on events both in this show and the rest of the Arrowverse.
- Curb-Stomp Battle: Eva easily overpowers Barry, although then again, he was recovering from a painful battle with Mirror Iris and is just trying to survive with his remaining speed.
- Death Equals Redemption: Mirror Iris apologizes to Barry and encourages him to seek Iris while Eva kills her.
- Death of a Thousand Cuts: Mirror Iris fighting Barry by using the reflective surfaces all over their loft. Especially when Eva shatters the mirror on the ceiling directly above Barry; surrounded by falling mirror shards, Barry was left helpless as he was attacked from each and every shard.
- Died in Your Arms Tonight: Mirror Iris being held by Barry.
- Downer Beginning: The experiment to create the artificial Speed Force ultimately fails. However, the very fact that it doesn't cause widespread destruction like the particle accelerator did is likely a small consolation.
- Entertainingly Wrong: Barry makes a few interesting, but ultimately false assumptions on what Mirror Iris is.
- "Eureka!" Moment: When Cecile remarks that Barry (whom they believe to be an impostor) seems like a mirror version of himself, Cecile figures out that McCulloch Technologies must have something to do with it all, much to Mirror Iris's discomfort.
- Even Evil Has Standards: Rosso looks kind of disturbed when he sees Mirror Kamilla callously sacrificing herself.
- Event Title: The episode's title alludes to Eva being liberated from the Mirrorverse.
- Fan Disservice: Barry's loose-fitting shirt often rides up during his fight with Mirror Iris, so you can see his well-defined torso. Too bad the poor man has been stabbed multiple times. Mirror Iris acting seductively to him is as creepy, especially due to Barry's status.
- Flashback-Montage Realization: A rarer external example of this trope, when Iris sees previous scenes replayed on the mirror screens, showing her that Eva was behind her abduction and has been working with her mirror counterpart this whole time.
- Forced to Watch: Eva makes a tied-up Iris watch as her husband is beaten and stabbed to an inch of his life, as well as her reflection straddle Barry's body.
- The Fourth Wall Will Not Protect You: Even the audience might get fooled when the machine Barry used to test whether Iris is a doppelgänger turned negative only to turn it against him and be tested positive. It was only revealed later that Mirror Iris is fully aware of the trap she's walking into, and Eva in turn switched the machine with a mirror duplicate without anyone knowing, explaining the switched results.
- Hoist by His Own Petard: Iris points out that despite Eva's protests, she still refers to Carver as her husband, because on some level she still loves him, just like how Iris and Barry love each other. This sends Eva into a mental downward spiral, and thus Mirror Iris as well, giving Barry the chance to reach through to the good part of his wife's doppelgänger.
- I Die Free: Mirror Iris remarks in her last moments that she now feels truly alive.
- "I Know You're in There Somewhere" Fight: Barry appeals to Mirror Iris, saying that he feels that there is a part of his wife inside of her and that it couldn't all have been a lie between them. It works.
- Internal Reveal:
- Iris realizes that Eva was the one behind the impostor Iris.
- Barry realizes that Iris, as well as Singh and Kamilla, are impostors and the real ones were kidnapped and are trapped in the mirrorverse.
- Let Me Get This Straight...: Ralph points out what a bad idea it is to use a device to create a new Speed Force solely based on the word of the most evil speedster in the multiverse.
- Literally Shattered Lives: Mirror Iris as she dies in Barry's arms.
- Long Game:
- Eva gloats about how the events of the episode are the culmination of a half-decade of planning.
- Bloodwork specifically uses the words "long game" to explain why he gives the Reflections what they're after but doesn't take the opportunity to escape.
- Mistaken for an Imposter: Thanks to Mirror Iris's manipulations, Nash and Cecile believe that Barry is the imposter for some time.
- Negated Moment of Awesome: Sadly, the attempt of creating a new Speed Force fails miserably.
- Never My Fault: Eva accuses Barry of forcing her to kill Mirror Iris.
- One-Winged Angel: Mirror Iris turns her arms into sharp mirror swords and stabs Barry from every reflective surface in the Loft.
- Real Life Writes the Plot: Caitlin spends the entire episode sick and couch-ridden, covered with a blanket, most likely to hide the pregnancy of Danielle Panabaker.
- The Reveal: Caitlin's absence has been explained as her recovering from her battle with Sunshine, with Frost's immune response sending her human half's body into a severe hypothermic reaction.
- Shout-Out: After successfully reviving Caitlin, Ralph says "Thank Elsa".
- Spotting the Thread: Rosso immediately notices that Mirror Iris is not as blindly loyal to Eva as Kamilla and Singh's doppelgangers.
- Streisand Effect: In-universe. Eva dissuading Iris from paying attention to the mirror makes Iris realize there is a door behind it and discover the truth about Eva.
- Talking the Monster to Death: Iris confronts Eva about still loving her husband, despite claims to the contrary. This makes her lose her focus so much that it also affects Mirror Iris.
- True Companions:
- Ralph puts himself through a risky and painful procedure, acting as a conduit of an electrical current, to jumpstart Caitlin's heart.
- Despite everything telling her that Barry is the copy, Cecile knows in her heart that Barry is the real Barry.
- Turn the Other Cheek: Despite being brutally beaten and cut by her, Barry still wants Mirror Iris to live her own life.
- Villain Ball: Eva lets Barry live, believing him to be too injured and almost out of speed to be a real threat to her. By that same token, she also lets Iris live.
- What Measure Is a Non-Human?: Eva considers the Reflections to be disposable servants to her, as demonstrated by her kamikaze plans for Mirror Kamilla. Barry, by contrast, encourages Mirror Iris to be her own person, though thanks to Eva it doesn't take.
- Worf Had the Flu: Barry's inability to defeat Mirror Iris and Eva comes from his limited access to the Speed Force. When Eva comes out of the mirror, Mirror Iris has already wounded and hit Barry multiple times.
- You Have Outlived Your Usefulness: Eva decides to kill Mirror Iris after Barry talks her down, clearly having no more use for her.
