With Barry in the speed force, Iris, Kid Flash, Joe and Vibe have taken over protecting Central City. However, when a powerful armored villain threatens to level the city if The Flash doesn't appear, Cisco makes a risky decision to break Barry out of the speed force. However, the Barry that comes out isn't the same Barry that went in.
- This episode takes place 6 months after the events of "Finish Line".
- This is the third episode of the series not to feature Tom Cavanagh.
- Wally refers to the Samuroid as Kurosawa, referencing famous Japanese film director and screenwriter, Akira Kurosawa.
- This is the first episode of the series to use a new title card.
- This is the first on-screen appearance of Shawna Baez since "Rogue Air".
- Barry's spectacular return from the Speed Force and his apparent confused state of mind while encountering Team Flash in the precinct somewhat resembles the Season 4 premiere of Smallville, entitled "Crusade". The latter episode features the return of protagonist Clark Kent from a several month long imprisonment at another plane of existence alongside some temporary personality changes.
- After Barry returns from the speed force he quotes some lines to which he relived the past and the future such as:
- When he was trying to convince Joe that his father didn't kill his mother in "Fastest Man Alive" (in a flashback).
- When he reminded to Harrison Wells that he said to him that the city was safe and that there was no danger, but it wasn't true in "Pilot".
- When he sang the line "Every Hour, Every Minutes" in his song to Iris in "Duet".
- When he travel back in time to save his mother in "Fast Enough".
- When he explained to Iris about the particle accelerator in "Pilot".
- When he told Oliver that he's not sure he can be a hero like him in "Pilot".
- When he was trying to convince a judge that he was innocent and that he didn't kill anybody in "The Trial of The Flash" (which happens in the future).
- Near the start of the episode, when the Samuroid first appears, Cisco jokingly calls him "Mifune". This is a reference to the famed Japanese actor Toshiro Mifune, well known for his work with Kurosawa (above) and also referenced in the animated series Soul Eater and Naruto.
- Cisco claims to have "made a few slight modifications" to the Speed Force bazooka, making note of his reference to the well-known phrase by Han Solo in the Star Wars franchise.
- When needing to wake Barry up, Cisco thinks of playing Poker Face by Lady Gaga, which was the same song Barry previously woke up to in Pilot.
- Cisco suggests that Barry's time may have given him the answers to "life, the universe and everything", referencing The Hitchhiker's Guide to the Galaxy.
- Caitlin follows this up by joking that the symbols Barry is drawing is his way of giving "42" to the prior question, a reference to its occurrence in The Hitchhiker's Guide to the Galaxy.
- Killer Frost references the Hulk with the phrase "don't make me frosty, you wouldn't like me when I'm frosty."
- This is the second time that the Flash new suit appeared in the series. The first time was in the episode "The Once and Future Flash" which is worn by Barry's future self.
- Cisco exclaims "Great Caesar's ghost", a phrase popularly used by DC character Perry White, and "Excelsior", the catchphrase of Marvel Comics legend Stan Lee.
|The Flash season 4|
|"The Flash Reborn" • "Mixed Signals" • "Luck Be a Lady" • "Elongated Journey Into Night" • "Girls Night Out" • "When Harry Met Harry..." • "Therefore I Am" • "Crisis on Earth-X, Part 3" • "Don't Run" • "The Trial of The Flash" • "The Elongated Knight Rises" • "Honey, I Shrunk Team Flash" • "True Colors" • "Subject 9" • "Enter Flashtime" • "Run, Iris, Run" • "Null and Annoyed" • "Lose Yourself" • "Fury Rogue" • "Therefore She Is" • "Harry and the Harrisons" • "Think Fast"|
|"We Are The Flash"|