Six years after the events of The X-Files series finale, former FBI agent Doctor Dana Scully is now a staff physician at Our Lady of Sorrows, a Catholic hospital, and treating a boy named Christian who has Sandhoff disease, a terminal brain condition. FBI agent Drummy arrives to ask Scully’s help in locating Fox Mulder, the fugitive former head of the X-Files division, and says they will call off its manhunt for him if he will help investigate the disappearances of several women, including young FBI agent Monica Banan. Mulder and Scully are called back to duty by the FBI when a former priest claims to be receiving psychic visions pertaining to a kidnapped agent.
Yes! The movie The X Files: I Want to Believe is now on Disney Plus in the countries listed below.
| Editing | Richard A. Harris | Editor |
| Production | Heike Brandstatter | Casting |
| Production | Coreen Mayrs | Casting |
| Production | Mindy Marin | Casting |
| Writing | Chris Carter | Screenplay |
| Directing | Chris Carter | Director |
| Production | Chris Carter | Producer |
| Writing | Frank Spotnitz | Screenplay |
| Production | Frank Spotnitz | Producer |
| Sound | Mark Snow | Original Music Composer |
| Art | Mark S. Freeborn | Production Design |
| Visual Effects | Mat Beck | Visual Effects Supervisor |
| Visual Effects | John C. Wash | Visual Effects Supervisor |
| Costume & Make-Up | Gitte Axen | Makeup Artist |
| Camera | Bill Roe | Director of Photography |
| Art | Tony Wohlgemuth | Art Direction |
| Art | Shirley Inget | Set Decoration |
| Costume & Make-Up | Lisa Tomczeszyn | Costume Design |
| Costume & Make-Up | Victoria Down | Makeup Department Head |
| Costume & Make-Up | Sandy Monesmith | Hairstylist |
| Crew | Julio Pallares | Makeup Effects |
| Crew | Christopher Mark Pinhey | Makeup Effects |
| Crew | Bill Terezakis | Makeup Effects |
| Crew | Maureen Terezakis | Makeup Effects |
| Production | Simon Abbott | Production Manager |
| Production | Wayne Bennett | Production Manager |
| Crew | David McKimmie | Post-Production Manager |
| Production | Brent O'Connor | Executive Producer |
| Production | Brent O'Connor | Unit Production Manager |
| Crew | Paul Rabwin | Post Production Supervisor |
| Crew | E. J. Foerster | Second Unit |
| Costume & Make-Up | Jared Brown | Set Dressing Artist |
| Costume & Make-Up | Raul Casillas | Set Dressing Artist |
| Costume & Make-Up | Geoff Coulter | Set Dressing Artist |
| Art | David Hadaway | Set Designer |
| Costume & Make-Up | Scott Holburn | Set Dressing Artist |
| Costume & Make-Up | Leonardo Lara | Set Dressing Artist |
| Art | Cheryl Marion | Assistant Art Director |
| Art | Marta McLaughlin | Assistant Property Master |
| Art | Wayne McLaughlin | Property Master |
| Art | Brad McMurray | Set Decorating Coordinator |
| Art | Eric Partridge | Assistant Property Master |
| Costume & Make-Up | Mark Prior | Set Dressing Artist |
| Art | Mike Rennison | Construction Coordinator |
| Art | Paul Rinaldi | Construction Foreman |
| Art | Sabine Schoppel | Art Department Coordinator |
| Writing | Jenny Seinen | Storyboard |
| Sound | David Betancourt | Foley |
| Sound | Smokey Cloud | Assistant Sound Editor |
| Sound | Scott Curtis | Foley Editor |
| Sound | Gloria D'Alessandro | Dialogue Editor |
| Sound | David Giammarco | Sound Re-Recording Mixer |
| Sound | Tim Gomillion | Sound Recordist |
| Sound | Galen Goodpaster | Assistant Sound Editor |
| Sound | David Grimaldi | Sound Effects Editor |
| Sound | Randall Guth | First Assistant Sound Editor |
| Sound | Warren Hendriks | Sound Effects Editor |
| Sound | Mildred Iatrou | ADR Editor |
| Sound | Martin Lacroix | Boom Operator |
| Sound | Eric A. Larsen | Assistant Sound Editor |
| Sound | David Lucarelli | ADR & Dubbing |
| Sound | Paul Massey | Sound Re-Recording Mixer |
| Sound | Chuck Michael | Sound Designer |
| Sound | Erin Michael Rettig | Sound Engineer |
| Sound | Charleen Richards | ADR & Dubbing |
| Sound | Dennis Rogers | Sound Recordist |
| Sound | Alicia Stevenson | Foley |
| Crew | William Unrau | Cableman |
| Sound | Michael T. Williamson | Sound Mixer |
| Crew | David Gauthier | Special Effects Coordinator |
| Crew | David Alexander | CG Supervisor |
| Crew | Rodrigo Armendariz | Compositors |
| Visual Effects | Steve Au | CG Painter |
| Crew | Michel Barrière | Compositors |
| Visual Effects | Bryce Brecheisen | Visual Effects Coordinator |
| Crew | Charles Collyer | Compositors |
| Visual Effects | Glenn Curry | CG Painter |
| Visual Effects | Anouk Deveault-Moreau | Visual Effects Supervisor |
| Crew | Linda Drake | Visual Effects Editor |
| Crew | Jason Dunn | Compositors |
| Crew | Andrew Edwards | Compositors |
| Crew | Ryan Epp | Compositors |
| Visual Effects | Thomas F. Ford IV | Visual Effects Producer |
| Crew | Mark Goldberg | Compositors |
| Crew | Don Greenberg | Compositors |
| Visual Effects | Junji Hirano | CG Painter |
| Visual Effects | Graham Houston | CG Painter |
| Visual Effects | Brenda Ilic | Visual Effects Producer |
| Visual Effects | Joni Jacobson | Visual Effects Producer |
| Visual Effects | Daniel Leduc | Visual Effects Producer |
| Visual Effects | Andrew Lema | CG Painter |
| Crew | Matthias Lowry | Compositors |
| Crew | Richard Martin | Compositors |
| Visual Effects | Jack Noriaki Matsumoto | CG Painter |
| Crew | Steve J. McLeod | Compositors |
| Crew | Vinay Mehta | Compositors |
| Visual Effects | Tena Montoya | Visual Effects Producer |
| Visual Effects | Eugene Paluso | CG Painter |
| Visual Effects | Rod Park | Visual Effects Producer |
| Crew | Brian Petras | Compositors |
| Crew | Pierre Raymond | Executive Visual Effects Producer |
| Production | Dan Rucinski | Production Supervisor |
| Crew | Brian Sales | Compositors |
| Visual Effects | Andrea Shear | CG Painter |
| Crew | Wayne A. Shepherd | Compositors |
| Visual Effects | Randal Shore | Visual Effects Producer |
| Visual Effects | Trent Smith | Visual Effects Producer |
| Crew | Christina Spring | Compositors |
| Crew | Mike Spring | Compositors |
| Crew | Marty Taylor | Compositors |
| Crew | Patrick Thompson | Compositors |
| Production | Anne Tremblay | Administration |
| Crew | Donald Tse | Compositors |
| Visual Effects | Dmitry Vinnik | CG Painter |
| Crew | Dave Williams | Compositors |
| Visual Effects | Ian Wilson | CG Painter |
| Crew | Chris Atkinson | Stunts |
| Crew | James Bamford | Stunts |
| Crew | Guy Bews | Stunts |
| Crew | Kimberly Chiang | Stunts |
| Crew | Duane Dickinson | Stunts |
| Crew | Mike Dobbin | Stunts |
| Crew | Bill Edwards | Stunts |
| Crew | Corbin Fox | Stunts |
| Crew | Dean Hart | Stunts |
| Crew | Dave Lane | Stunts |
| Crew | Mike Mitchell | Stunt Coordinator |
| Crew | Tony Morelli | Stunts Coordinator |
| Crew | Jennifer Mylrea | Stunts |
| Crew | Jeff Sanca | Stunts |
| Crew | Todd Scott | Stunts |
| Crew | Melissa R. Stubbs | Stunts |
| Crew | Natasha Vasiluk | Stunts |
| Crew | Marshall Virtue | Stunts |
| Crew | Chris Webb | Stunts |
| Camera | Matt Almas | Grip |
| Lighting | Ryan Bailey | Gaffer |
| Camera | John S. Bartley | Second Unit Director of Photography |
| Camera | Mitch Bax | Camera Intern |
| Camera | Cory Budney | First Assistant Camera |
| Crew | George Collins | Video Assist Operator |
| Crew | Charles Andre | Stunts |
| Production | Mark Sweatman | Production Assistant |
| Directing | Portia Tickell | Script Supervisor |
| Sound | Matthew Harrison | Foley Editor |
| Visual Effects | Shane Strickman | Visual Effects Coordinator |
