With Godspeed's return, and Barry's speed spent from the confrontation with Mirror Iris, Team Flash must turn to help from an unlikely source, The Pied Piper.
- Actually a Doombot: The Godspeed encountered in this episode is yet another drone.
- Alien Blood: Godspeed bleeds "charged sound", which helps stabilize Roderick.
- Almighty Mom: Cecile stops Barry and Cisco's argument and encourages them to make a plan before arriving to conclusions.
- Big Damn Heroes: First Nash comes to Barry's rescue when Godspeed attacks him at S.T.A.R. Labs, and later Hartley saves his life and helps defeat the evil speedster by combining his powers with Barry's.
- The Bus Came Back: Pied Piper returns this episode to assist the heroes with Godspeed. The real Kamilla Hwang also returns, still trapped in the Mirrorverse with Iris.
- Bus Crash: All the other Godspeeds were killed by the latest one.
- Call-Back:
- Godspeed's thirst for Barry's speed and homicidal tendencies easily resemble Zoom's behavior back in Season 2.
- Similar to when the team was facing the then-villainous Black Siren, Team Flash consults Hartley due to his expertise in sonic waves.
- Godspeed gets defeated by Barry and Hartley crossing streams.
- Kamilla can be seen running experiments on Cicada's dagger, which had been sent into the Mirrorverse back in Season 5.
- The Chains of Commanding:
- Allegra tells Barry she is afraid of having to take over leadership of the Central City Citizen.
- Barry has doubts about his leadership after failing to realize about Iris' impersonation before and not having Joe and Iris on his side at the moment.
- Combination Attack: Barry throws a ligthning bolt and Hartley throws his sonic waves to launch Godspeed a combined attack.
- Continuity Nod: Frost reads a Rebecca Silver novel.
- Cosmic Retcon: In the new post-Crisis reality, Hartley has Mooks during his original confrontation with the Flash. His enmity with Barry post-retcon is due to Barry crippling his right-hand man (who is also his boyfriend) with lightning. The confrontation indicates that Barry learned to throw lightning much sooner.
- Enemy Mine: Team Flash has to recruit Pied Pier to figure out how to defeat Godspeed, and he only agrees when they offer to help his molecularly unstable boyfriend.
- Even Evil Has Loved Ones: Cisco accuses Hartley of only caring about himself, but it turns out that his right-hand man Roderick is also his boyfriend.
- Friendship Moment:
- Ralph shows his support for Frost when she is afraid to see Carla Snow.
- Hartley and Barry share a brief one at the end, where Hartley thanks Barry for helping him restore his world and encouraging him to do the same to his own.
- The Glasses Gotta Go: Hartley isn't wearing glasses anymore.
- Good Is Not Nice: Even after coming around, Hartley still can't stop acting like a dick completely.
- Heel–Face Turn: Hartley becomes good as he was in the pre-Crisis timeline.
- Heroic BSoD: Nearly everyone is initially ridden with despair throughout the episode due to the uncertain fates of their friends.
- Internal Reveal:
- Barry visits Joe to tell him about Iris being impersonated by a mirror clone and kidnapped in a mirror dimension. Barry also tells him about Mirror Iris' death.
- Iris tells Kamilla that Eva McCulloch kidnapped her and was behind her clone. Kamilla learns that Eva is alive.
- Ironic Echo: The defeat of Godspeed from the start of the season is recreated shot-for-shot, but with Barry & Godspeed switching roles.
- It's All My Fault: A recurring theme throughout the episode. Allegra, Barry and Cisco all blame themselves for their friends fates at numerous points throughout the episode. Hartley also blames himself for what happened to Roderick.
- I Work Alone: Due to her falling out with Nash, Allegra still doesn't let Nash accompany her to the Central City Citizen office to find evidence.
- Karmic Jackpot: Hartley helping beat the Godspeed drone allowed him to get his boyfriend back due to the drone coming with compressed sound.
- Nice Job Fixing It, Villain: Godspeed inadvertently allowed Team Flash to save Roderick with the drone's "blood" he sent.
- Out of Focus: Joe, due to still being in WITSEC, only appears in the opening scene. Similarly, Caitlin has a minor role due to her illness.
- Paper-Thin Disguise: Hartley figured out both Vibe's and Flash's secret identities long ago and point out how easy it was in Cisco's case particularly, due to his haircut.
- Power Parasite: Godspeed can steal Barry's speed to some extent.
- Pun: As a parting gift, Ralph gives Frost a "Dib-Ploma" (as her life coach).
- Recruiting the Criminal: Barry recruits Hartley to help him with the fifth Godspeed due to his experience with sonic waves.
- Resolved Noodle Incident: The reason for Hartley's grudge against the Flash is revealed: a Retcon of the scene in "The Sound and the Fury" where Hartley attacked the bridge with several mooks, and when his sonic waves clashed with the Flash's lightning, one of Hartley's mooks (who happens to be his lover) gets caught in the blast, ending up in a coma-like state.
- Rousing Speech: Barry gives one to the team at the end of the episode.
- Sanity Slippage: Iris is starting to succumb to the same neurological degradation that Eva did, due to long-term exposure to the Mirrorverse. She even starts scratching her arm the same way.
- Shout-Out:
- The title is an allusion to The Pied Piper of Hamelin, which is fitting for Hartley.
- Hartley calls Barry Oprah when the latter tries to give him some advice.
- The Stinger: Eva waking up in a pod and declaring her intent for revenge on her husband.
- Trust Password: Iris has to go through several of these in order to convince Kamilla she's not a Reflection.
- The Unreveal: We still don't know the truth behind the Godspeed clones that have been plaguing Central City since the beginning of the season, only that someone is sending them in their own stead.
- Weak, but Skilled: Despite having lost a lot of his speed, Barry keeps Godspeed occupied because he knows the city better than him.
- Wham Line: Cisco needing a "loss-less self-sustaining source of perpetual energy" device to rescue their friends from the Mirrorverse, specifically where he can get one crucial component: "Atlantis".
- You Are Better Than You Think You Are: A running theme of the episode.
- Nash encourages Barry, who feels like he's unable to lead the team after failing to detect Iris' mirror clone.
- Cecile encourages Cisco, who feels helpless without both his powers and Kamilla.
- Kamilla encourages Iris, who feels utterly incapable of escaping the Mirrorverse.
- Ralph tells Frost that she doesn't need to fear properly meeting Caitlin's mother, because she's as much of a good person as Caitlin is, rather than just Caitlin's dark side as she feels she is.
