Actors in both Stargate Atlantis and The X-Files
61 actors have appeared in both Stargate Atlantis and The X-Files, across 318 episodes. The most-credited is Mitch Pileggi, Col. Steven Caldwell in Stargate Atlantis and Assistant Director Walter Skinner in The X-Files.
| Actor | In Stargate Atlantis | In The X-Files | Eps | Eps |
|---|---|---|---|---|
| Mitch Pileggi | Col. Steven Caldwell | Assistant Director Walter Skinner | 22 | 70 |
| Paul McGillion | Dr. Carson Beckett | Fred Neiman | 26 | 1 |
| Bill Dow | Dr. Bill Lee | Dr. Charles Burks, Dad, Dr. Rick Newton | 7 | 9 |
| Jewel Staite | Dr. Jennifer Keller, Ellia | Amy Jacobs | 13 | 1 |
| Brendan Beiser | Tavius | Agent Sean Pendrell | 1 | 10 |
| Amanda Tapping | Lt. Colonel Samantha Carter | Carina Sayles | 5 | 1 |
| Ryan Robbins | Ladon Radim | Murphy | 5 | 1 |
| William MacDonald | Captain Hugh Griffin | Agent Dan Kazanjian, Buddy Riggs, Dr. Oppenheim | 1 | 5 |
| Sharon Taylor | Amelia Banks, Replicator Tech, Technician | Diana Eggers | 12 | 1 |
| Karin Konoval | Second in Command | Little Chucky Poundstone, Little Judy Poundstone, Madame Zelma | 1 | 3 |
| Scott Heindl | Male Wraith, Wraith, Wraith Leader | Billy | 6 | 1 |
| Ben Cotton | Dr. Kavanagh | Mr. Paulsen | 6 | 2 |
| Erin Chambers | Sora | Anna Strong | 3 | 1 |
| Kevin McNulty | Chancellor Lycus | Agent Fuller, Dr. Christopher Davey | 1 | 3 |
| Mike Dopud | Kiryk | Mr. Y's Henchman | 1 | 1 |
| Alan C. Peterson | Magistrate | Mr. Y | 1 | 2 |
| Don S. Davis | Lieutenant General George S. Hammond | Captain William Scully | 1 | 2 |
| Jay Brazeau | Lord Protector | Dr. Daly, Professor Varnes | 1 | 2 |
| Brent Stait | Michael Kenmore | Timothy Mayhew, Corp. Taylor | 1 | 3 |
| Sean Campbell | Solen Sincha | Local Cop, Officer Sean | 2 | 2 |
Cast data from TVmaze, licensed CC BY-SA 4.0.