Actors in both NCIS and The Big Bang Theory
88 actors have appeared in both NCIS and The Big Bang Theory, across 787 episodes. The most-credited is Margo Harshman, Delilah Fielding in NCIS and Alex Jensen in The Big Bang Theory.
| Actor | In NCIS | In The Big Bang Theory | Eps | Eps |
|---|---|---|---|---|
| Margo Harshman | Delilah Fielding | Alex Jensen | 21 | 4 |
| Brian George | Dr. Ameen Temani | Dr. V.M. Koothrappali | 1 | 16 |
| Brian Thomas Smith | Larry | Zack Johnson | 1 | 11 |
| Bob Newhart | Doctor Walter Magnus | Arthur Jeffries | 1 | 6 |
| Casey Sander | Ed Gantry | Mike Rostenkowski | 1 | 6 |
| Dean Norris | Vestman | Colonel Williams | 1 | 6 |
| Keith Carradine | Manheim Gold | Wyatt | 1 | 5 |
| Mark Harelik | Ron Levinson | Dr. Eric Gablehauser | 1 | 5 |
| Vernée Watson | Miss Helen Frimkes | Althea | 1 | 5 |
| Brian Patrick Wade | Marine Lance Corporal, Marine Private David Singer | Kurt | 2 | 3 |
| Swati Kapila | CEO Tamara Hamilton | Ruchi | 1 | 3 |
| Alex Ball | Navy Senior Chief Richard Granger | Waiter | 1 | 2 |
| Courtney Henggeler | Scorpio Sinn | Missy Cooper | 1 | 2 |
| Ian Reed Kesler | Mark Daniels, Police Officer Howard Shelly | Paramedic #2 | 2 | 1 |
| Jessica Walter | Judith McKnight | Mrs. Latham | 2 | 1 |
| Tania Raymonde | Anna Real, Chloe Marlene | Yvette | 2 | 1 |
| Travis Schuldt | Freddy Martin, Paul Miller | Eric | 2 | 1 |
| Angela Lin | Assistant District Attorney Sheila Addison | Maritza | 1 | 1 |
| Blake Berris | Walter Shibberd | Kevin | 1 | 1 |
| Christopher Lloyd | Joseph "Joe" Smith | Theodore | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.