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 | Marianne Jenkins | Executive Producer |
| Production | Bárbara Muschietti | Producer |
| Production | Michael Disco | Producer |
| Sound | Benjamin Wallfisch | Original Music Composer |
| Costume & Make-Up | Alexandra Byrne | Costume Design |
| Camera | Henry Braham | Director of Photography |
| Editing | Jason Ballantine | Editor |
| Art | Steven Lawrence | Art Direction |
| Art | Marco Anton Restivo | Art Direction |
| Editing | Paul Machliss | Editor |
| Art | Jason Knox-Johnston | Supervising Art Director |
| Crew | Jordan Weaver | Other |
| Crew | Lucy Allen | Stunts |
| Production | Galen Vaisman | Executive Producer |
| Writing | Jonathan Goldstein | Screenstory |
| Writing | John Francis Daley | Screenstory |
| Production | Deanna Marshall | Assistant Accountant |
| Crew | Paul Biddiss | Military Consultant |
| Writing | Harry Lampert | Characters |
| Writing | Gardner Fox | Characters |
| Writing | Joe Shuster | Characters |
| Writing | Jerry Siegel | Characters |
| Visual Effects | Manraj Bhari | Visual Effects Production Assistant |
| Art | Felicity Hickman | Set Dresser |
| Sound | Randy Torres | Sound Effects Editor |
| Costume & Make-Up | Katie Jones | Set Costumer |
| Art | Will Houghton-Connell | Assistant Art Director |
| Art | Julia Dehoff | Art Direction |
| Art | Dominique Law | Assistant Art Director |
| Art | Paul Savulescu | Assistant Art Director |
| Costume & Make-Up | Carmel Jackson | Makeup Artist |
| Art | Christine Lois | Assistant Art Director |
| Art | Dominic Capon | Set Decoration |
| Sound | Brandon Jones | Sound Designer |
| Costume & Make-Up | Victoria Down | Makeup Designer |
| Costume & Make-Up | Emmy Beech | Makeup Artist |
| Sound | Nancy Nugent | Supervising Sound Editor |
| Costume & Make-Up | Mike Smithson | Makeup Artist |
| Art | Laura Mickiewicz | Art Direction |
| Art | Sian Midgley | Standby Art Director |
| Sound | Greg ten Bosch | Sound Effects Editor |
| Costume & Make-Up | Gabor Kerekes | Makeup Supervisor |
| Costume & Make-Up | Marzenna Fus-Mickiewicz | Makeup Artist |
| Production | Toby Emmerich | Executive Producer |
| Sound | Colin Nicolson | Production Sound Mixer |
| Crew | Rick English | Stunt Double |
| Visual Effects | Leonardo Costa | Visual Effects Supervisor |
| Visual Effects | Brad Minnich | Visual Effects Supervisor |
| Visual Effects | Scott Vosbury | Visual Effects Supervisor |
| Visual Effects | Andrew Lockley | Visual Effects Supervisor |
| Visual Effects | Bryan Hirota | Visual Effects Supervisor |
| Production | Michael Lerman | Co-Producer |
| Visual Effects | John 'D.J.' Des Jardin | Visual Effects Supervisor |
| Writing | Robert Kanigher | Characters |
| Writing | Carmine Infantino | Characters |
| Visual Effects | Tamara Watts Kent | Visual Effects Producer |
| Sound | Kim Baum | Music Supervisor |
| Writing | Joby Harold | Screenstory |
| Production | Kate Ringsell | Casting |
| Production | Rich Delia | Casting |
| Crew | Jack White | Thanks |
| Crew | Frank Miller | Thanks |
| Crew | Ramona Fradon | Thanks |
| Crew | David Mazzucchelli | Thanks |
| Crew | Scott Kolins | Thanks |
| Crew | Geoff Johns | Thanks |
| Crew | Al Plastino | Thanks |
| Writing | Bob Kane | Characters |
| Writing | William Moulton Marston | Characters |
| Crew | John Broome | Thanks |
| Crew | Rob Cowan | Thanks |
| Crew | Curt Swan | Thanks |
| Crew | Jerry Robinson | Thanks |
| Crew | Mort Weisinger | Thanks |
| Crew | Mark Millar | Thanks |
| Writing | Bill Finger | Characters |
| Crew | Nikolaj Coster-Waldau | Thanks |
| Crew | Mike Baron | Thanks |
| Crew | Matías Lértora | Thanks |
| Crew | George Pérez | Thanks |
| Crew | Paul Norris | Thanks |
| Crew | Francis Manapul | Thanks |
| Crew | Harry G. Peter | Thanks |
| Crew | Irv Novick | Thanks |
| Crew | Dick Sprang | Thanks |
| Crew | Jeffrey Wetzel | Thanks |
| Crew | Dave Johnson | Thanks |
| Crew | Cary Bates | Thanks |
| Crew | Otto Binder | Thanks |
| Crew | Andy Kubert | Thanks |
| Crew | Joe Quinones | Thanks |
| Crew | Marv Wolfman | Thanks |
| Crew | Ashley Beck | Stunt Double |
| Crew | Claudia Heinz | Stunt Double |
| Crew | Liam Coote | Stunt Double |
| Crew | Kenny Knight | Stunt Double |
| Crew | Adam Bowman | Stunt Double |
| Crew | Joseph Paxton | Stunt Double |
| Crew | Eunice Huthart | Stunt Coordinator |
| Crew | Paul Bailey | Stunt Driver |
| Crew | Aidan Brindle | Stunt Driver |
| Crew | Talila Craig | Utility Stunts |
| Crew | Isaac Hamon | Stunt Coordinator |
| Crew | Joel Conlan | Stunt Driver |
| Crew | Lee Millham | Stunt Driver |
| Crew | Matt Sherren | Stunt Driver |
| 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 |
| Crew | Doren John Farmer | Stunts |
| Costume & Make-Up | Dan Grace | Costume Supervisor |
| Crew | Michael Byrch | Stunts |
| Crew | Luke Tumber | Stunts |
