Barry Allen ontdekt dat hij als superheld The Flash over zoveel snelheid beschikt dat hij kan reizen door de tijd. Hij gebruikt die gave om te proberen een rampzalige gebeurtenis uit zijn verleden - de dood van zijn moeder en de onterechte beschuldiging tegen zijn vader - te voorkomen. Maar op de terugweg naar het heden komt Barry vast te zitten in een ander universum.
| Production | Michael Disco | Producer |
| Production | Bárbara Muschietti | Producer |
| Production | Marianne Jenkins | Executive Producer |
| Sound | Benjamin Wallfisch | Original Music Composer |
| Costume & Make-Up | Alexandra Byrne | Costume Design |
| Camera | Henry Braham | Director of Photography |
| Editing | Paul Machliss | Editor |
| Art | Steven Lawrence | Art Direction |
| Editing | Jason Ballantine | Editor |
| Art | Marco Anton Restivo | Art Direction |
| Art | Jason Knox-Johnston | Supervising Art Director |
| Crew | Jordan Weaver | Other |
| Crew | Lucy Allen | Stunts |
| Writing | John Francis Daley | Screenstory |
| Writing | Jonathan Goldstein | Screenstory |
| Production | Galen Vaisman | Executive Producer |
| Production | Deanna Marshall | Assistant Accountant |
| Crew | Paul Biddiss | Military Consultant |
| Writing | Gardner Fox | Characters |
| Writing | Harry Lampert | Characters |
| Writing | Joe Shuster | Characters |
| Writing | Jerry Siegel | Characters |
| Visual Effects | Manraj Bhari | Visual Effects Production Assistant |
| Sound | Randy Torres | Sound Effects Editor |
| Art | Dominic Capon | Set Decoration |
| Art | Dominique Law | Assistant Art Director |
| Sound | Nancy Nugent | Supervising Sound Editor |
| Art | Laura Mickiewicz | Art Direction |
| Art | Christine Lois | Assistant Art Director |
| Art | Paul Savulescu | Assistant Art Director |
| Costume & Make-Up | Marzenna Fus-Mickiewicz | Makeup Artist |
| Costume & Make-Up | Emmy Beech | Makeup Artist |
| Art | Will Houghton-Connell | Assistant Art Director |
| Costume & Make-Up | Mike Smithson | Makeup Artist |
| Costume & Make-Up | Victoria Down | Makeup Designer |
| Sound | Brandon Jones | Sound Designer |
| Art | Felicity Hickman | Set Dresser |
| Sound | Greg ten Bosch | Sound Effects Editor |
| Art | Julia Dehoff | Art Direction |
| Costume & Make-Up | Carmel Jackson | Makeup Artist |
| Costume & Make-Up | Katie Jones | Set Costumer |
| Art | Sian Midgley | Standby Art Director |
| Costume & Make-Up | Gabor Kerekes | Makeup Supervisor |
| Production | Toby Emmerich | Executive Producer |
| Sound | Colin Nicolson | Production Sound Mixer |
| Crew | Rick English | Stunt Double |
| Visual Effects | Andrew Lockley | Visual Effects Supervisor |
| Visual Effects | Brad Minnich | Visual Effects Supervisor |
| Visual Effects | Scott Vosbury | Visual Effects Supervisor |
| Visual Effects | Bryan Hirota | Visual Effects Supervisor |
| Visual Effects | Leonardo Costa | Visual Effects Supervisor |
| Writing | Carmine Infantino | Characters |
| Writing | Robert Kanigher | Characters |
| Sound | Kim Baum | Music Supervisor |
| Production | Rich Delia | Casting |
| Writing | Joby Harold | Screenstory |
| Visual Effects | John 'D.J.' Des Jardin | Visual Effects Supervisor |
| Visual Effects | Tamara Watts Kent | Visual Effects Producer |
| Production | Michael Lerman | Co-Producer |
| Production | Kate Ringsell | Casting |
| Crew | Otto Binder | Thanks |
| Crew | Irv Novick | Thanks |
| Crew | Dick Sprang | Thanks |
| Crew | Harry G. Peter | Thanks |
| Crew | Ramona Fradon | Thanks |
| Crew | David Mazzucchelli | Thanks |
| Crew | Francis Manapul | Thanks |
| Crew | Jerry Robinson | Thanks |
| Crew | Marv Wolfman | Thanks |
| Crew | Frank Miller | Thanks |
| Crew | Cary Bates | Thanks |
| Crew | Paul Norris | Thanks |
| Crew | Mark Millar | Thanks |
| Crew | John Broome | Thanks |
| Crew | Geoff Johns | Thanks |
| Crew | Matías Lértora | Thanks |
| Crew | George Pérez | Thanks |
| Crew | Jack White | Thanks |
| Crew | Andy Kubert | Thanks |
| Crew | Jeffrey Wetzel | Thanks |
| Crew | Dave Johnson | Thanks |
| Crew | Joe Quinones | Thanks |
| Crew | Scott Kolins | Thanks |
| Writing | Bill Finger | Characters |
| Crew | Curt Swan | Thanks |
| Writing | William Moulton Marston | Characters |
| Crew | Nikolaj Coster-Waldau | Thanks |
| Crew | Mort Weisinger | Thanks |
| Writing | Bob Kane | Characters |
| Crew | Rob Cowan | Thanks |
| Crew | Mike Baron | Thanks |
| Crew | Al Plastino | Thanks |
| Crew | Joel Conlan | Stunt Driver |
| Crew | Lee Millham | Stunt Driver |
| Crew | Talila Craig | Utility Stunts |
| Crew | Eunice Huthart | Stunt Coordinator |
| Crew | Joseph Paxton | Stunt Double |
| Crew | Liam Coote | Stunt Double |
| Crew | Claudia Heinz | Stunt Double |
| Crew | Paul Bailey | Stunt Driver |
| Crew | Aidan Brindle | Stunt Driver |
| Crew | Ashley Beck | Stunt Double |
| Crew | Kenny Knight | Stunt Double |
| Crew | Matt Sherren | Stunt Driver |
| Crew | Isaac Hamon | Stunt Coordinator |
| Crew | Adam Bowman | Stunt Double |
| Crew | Elizabeth Donker Curtius | Stunts |
| Visual Effects | Rahul Roy | Compositing Lead |
| Production | Walter Hamada | Executive Producer |
| Writing | Christina Hodson | Screenplay |
| Directing | Andy Muschietti | Director |
| Art | Paul D. Austerberry | Production Design |
