Actors in both Stargate Atlantis and Stargate SG·1
150 actors have appeared in both Stargate Atlantis and Stargate SG·1, across 313 episodes. The most-credited is Gary Jones, Sgt. Walter Harriman in Stargate Atlantis and Sgt. Walter Harriman in Stargate SG·1.
| Actor | In Stargate Atlantis | In Stargate SG·1 | Eps | Eps |
|---|---|---|---|---|
| Gary Jones | Sgt. Walter Harriman | Sgt. Walter Harriman | 12 | 111 |
| David Nykl | Dr. Radek Zelenka | Dr. Radek Zelenka | 54 | 1 |
| Peter Kufluk | MSgt. Connor | MSgt. Connor | 7 | 93 |
| Kavan Smith | Major Lorne | Major Lorne | 29 | 2 |
| Dan Shea | Sgt. Sylvester Siler | Sgt. Sylvester Siler, MSgt. Sylvester Siler, Fire Fighter | 1 | 60 |
| Bill Dow | Dr. Bill Lee | Dr. Bill Lee | 7 | 20 |
| Paul McGillion | Dr. Carson Beckett | Young Ernest Littlefield | 26 | 1 |
| Christopher Heyerdahl | Wraith Leader (Todd), Halling, Male Wraith | Pallan | 22 | 1 |
| Michael Shanks | Dr. Daniel Jackson | Thor, Dr. Daniel Jackson, Aegir | 3 | 20 |
| Chuck Campbell | Chuck | Atlantis Technician | 40 | 1 |
| Colin Cunningham | Major Paul Davis | Major Paul Davis | 1 | 15 |
| Robert Picardo | Richard Woolsey | Richard Woolsey | 6 | 7 |
| Martin Christopher | Major Marks | Kevin Marks | 5 | 12 |
| Don S. Davis | Lieutenant General George S. Hammond | Lt. Gen. George Hammond | 1 | 7 |
| Richard Dean Anderson | Jack O'Neill | Jack O'Neill | 4 | 4 |
| Torri Higginson | Dr. Elizabeth Weir, Old Weir | Dr. Elizabeth Weir | 5 | 3 |
| Mike Dopud | Kiryk | Jaffa, Colonel Chernovshev, Eurondan Soldier | 1 | 6 |
| Garwin Sanford | Simon Wallis | Narim | 3 | 3 |
| Sean Tyson | Jervis | TSgt. Mecker, Agent Singer, Ori Firstman | 1 | 17 |
| Martin Wood | Largent | Major Wood, Director, Fire Fighter | 1 | 25 |
Cast data from TVmaze, licensed CC BY-SA 4.0.