Actors in both Smallville and Stargate SG·1
256 actors have appeared in both Smallville and Stargate SG·1, across 430 episodes. The most-credited is Teryl Rothery, Board Member #2, Real Estate Agent in Smallville and Dr. Janet Fraiser, Heimdall in Stargate SG·1.
| Actor | In Smallville | In Stargate SG·1 | Eps | Eps |
|---|---|---|---|---|
| Teryl Rothery | Board Member #2, Real Estate Agent | Dr. Janet Fraiser, Heimdall | 2 | 75 |
| Michael Shanks | Carter Hall / Hawkman | Thor, Dr. Daniel Jackson, Aegir | 4 | 20 |
| Alessandro Juliani | Dr. Emil Hamilton | Katep, Eliam | 14 | 3 |
| Eric Breker | Roy Rothman | Albert Reynolds | 1 | 16 |
| Mitchell Kosterman | Sheriff Ethan Miller | Col. Tom Rundell, Special Agent James Hamner | 14 | 3 |
| Colin Cunningham | Nicky Taylor | Major Paul Davis | 1 | 15 |
| Erica Durance | Lois Lane, Lois Lane (Mirror World), Brianna Withridge | Krista James | 15 | 1 |
| Mike Dopud | Security Guard George | Jaffa, Colonel Chernovshev, Eurondan Soldier | 10 | 6 |
| Robert Wisden | Gabe Sullivan | Bert Samuels | 6 | 4 |
| Adrian Holmes | Basqat, Griff | Det. J. Ryan, Sgt. Krieger | 7 | 2 |
| Robert Picardo | Edward Teague | Richard Woolsey | 2 | 7 |
| Alex Zahara | Dr. Jansen | Alien #1, Capt. Warrick Trevor, Eggar | 1 | 7 |
| Colin Lawrence | Agent Stocker, Captain Nichols, Doctor | Major Carl Warren, Major Lawrence | 3 | 5 |
| Kendall Cross | Jessica Kent, Lara-El, Little Girl's Mother | Julia Donovan | 3 | 4 |
| Alisen Down | Lillian Luthor | Dr. Brightman | 5 | 1 |
| Anna Galvin | Gina | Dr. Reya Varrick | 5 | 1 |
| Hiro Kanagawa | Principal H. James Kwan | Mr. Wayne | 5 | 1 |
| Jerry Wasserman | Dr. Yaeger Scanlan | Bernie Whitlow, Stan | 4 | 2 |
| Lexa Doig | Dr. Christina Lamell | Dr. Carolyn Lam | 1 | 11 |
| Tom O'Brien | Roger Nixon | Brian Vogler | 5 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.