| Person | Type | Job | Role(s) | Episodes |
|---|---|---|---|---|
 Alex Graves | Crew | Directing | Director | 2 |
 Barry Jossen | Crew | Production | Executive Producer | 20 |
 C. Kim Miles | Crew | Camera | Director of Photography | 20 |
Carla Hetland | Crew | Costume & Make-Up | Costume Design | 20 |
François Dagenais | Crew | Camera | Director of Photography | 10 |
Harley Peyton | Crew | Writing | Writer | 20 |
Jack Rapke | Crew | Production | Executive Producer | 20 |
 John Scott | Crew | Directing | Director | 10 |
 Loni Peristere | Crew | Directing | Director | 10 |
Martin Nicholson | Crew | Editing | Editor | 10 |
Norma Bailey | Crew | Directing | Director | 20 |
 Pete Travis | Crew | Directing | Director | 4 |
 Robert Stromberg | Crew | Directing | Director | 2 |
 Robert Zemeckis | Crew | Production | Executive Producer | 12 |
Ross Dempster | Crew | Art | Production Design | 20 |
Scot Boland | Crew | Production | Casting | 20 |
Thania St. John | Crew | Writing | Writer | 2 |
 Thomas Carter | Crew | Directing | Director | 2 |
 Victoria Burrows | Crew | Production | Casting | 20 |
 Wendey Stanzler | Crew | Directing | Director | 2 |
Rick Willoughby | Crew | Art | Art Direction | 10 |
Daniel Wohl | Crew | Sound | Music, Original Music Composer | 2 |
Janessa Hitsman | Crew | Art | Set Decoration | 20 |
Jacqueline Levine | Crew | Production | Executive Producer | 20 |
Thomas Ma | Crew | Directing | Assistant Director Trainee | 1 |
Alec Wells | Crew | Writing | Writer, Staff Writer | 10 |
Robert Paller | Crew | Crew | Special Effects Coordinator | 10 |
Amy Hetland | Crew | Costume & Make-Up | Costume Set Supervisor | 20 |
Cecil O'Connor | Crew | Production | Producer | 10 |
Sean Jablonski | Crew | Writing | Writer, Executive Producer | 20 |
David O'Leary | Crew | Writing | Writer, Executive Producer | 10 |
Stewart Kaye | Crew | Writing | Writer | 1 |
Aaron Rapke | Crew | Writing | Writer | 1 |
Jessica Harrison | Crew | Sound | Music Editor | 20 |
Rebecca Lee | Crew | Costume & Make-Up | Makeup Designer | 20 |
Daryl Hartwell | Crew | Camera | "A" Camera Operator | 20 |
Noah Pontell | Crew | Editing | Editor | 20 |
Chris Nguyen-Gia | Crew | Production | Co-Producer | 10 |
Linda Burstyn | Crew | Writing | Writer | 10 |
Emily Brochin | Crew | Writing | Writer, Story Editor | 20 |
Gillian Pearson | Crew | Visual Effects | Visual Effects Producer | 20 |
John Gajdecki | Crew | Visual Effects | Visual Effects Supervisor | 20 |
 Aidan Gillen | Cast | Actor | Dr. Allen Hynek | 20 |
 Bob Gunton | Cast | Actor | President Harry S. Truman | 1 |
 Bronson Pinchot | Cast | Actor | David Dubrovsky | 1 |
 Christopher Heyerdahl | Cast | Actor | Edmund | 1 |
 Currie Graham | Cast | Actor | Cal Miller | 5 |
 Graham Greene | Cast | Actor | David | 1 |
 Ian Tracey | Cast | Actor | William | 3 |
 Ksenia Solo | Cast | Actress | Susie Miller | 20 |
 Laura Mennell | Cast | Actress | Mimi Hynek | 20 |
 Matt O'Leary | Cast | Actor | Lieutenant Henry Fuller | 6 |
 Michael Harney | Cast | Actor | General Hugh Valentine | 20 |
 Michael Imperioli | Cast | Actor | Edward Rizzuto | 3 |
 Neal McDonough | Cast | Actor | General James Harding | 20 |
 Robert John Burke | Cast | Actor | William Fairchild | 7 |
 Sofia Milos | Cast | Actress | Daria | 3 |
 Spencer Garrett | Cast | Actor | General Ryan Blackstone | 2 |
 Thomas Kretschmann | Cast | Actor | Wernher von Braun | 1 |
 Caspar Phillipson | Cast | Actor | John F. Kennedy | 3 |
 Heather Doerksen | Cast | Actress | Donna Smith | 3 |
 Jill Morrison | Cast | Actress | Faye | 11 |
 Keir O'Donnell | Cast | Actor | Evan Blake | 4 |
 Zach McGowan | Cast | Actor | Duncan Booker | 2 |
 Michael Malarkey | Cast | Actor | Captain Michael Quinn | 20 |
 Jerod Haynes | Cast | Daniel Banks | 5 | |
 Nicholas Holmes | Cast | Actor | Joel Hynek | 12 |
 Jason Burkart | Cast | Actor | Greg | 1 |
 Nolan Hupp | Cast | Actor | Eric | 1 |
 Deborah Trotchine | Cast | Actress | Student | 10 |
| Person | Type | Job | Role(s) | Episodes |
