Actors in both 3rd Rock from the Sun and Seinfeld
96 actors have appeared in both 3rd Rock from the Sun and Seinfeld, across 319 episodes. The most-credited is Wayne Knight, Officer Don Orville in 3rd Rock from the Sun and Newman in Seinfeld.
| Actor | In 3rd Rock from the Sun | In Seinfeld | Eps | Eps |
|---|---|---|---|---|
| Wayne Knight | Officer Don Orville | Newman | 8 | 49 |
| Ileen Getz | Dr. Judith Draper | Organizer | 32 | 1 |
| Ron West | Dr. Vincent Strudwick | Dr. Strugatz | 16 | 1 |
| Richard Fancy | Judge DeBelko | Mr. Lippman, Mr. Breckman | 2 | 10 |
| Michael Milhoan | Coach Strickland | Security Guard | 5 | 1 |
| Richard McGonagle | Dr. Howard | Mr. Star | 5 | 1 |
| John D'Aquino | Mr. Randell | Todd Gack | 4 | 1 |
| Victor Raider-Wexler | Janitor | Doctor | 1 | 4 |
| Ana Gasteyer | Ana Gasteyer, Dr. Brand | Woman | 3 | 1 |
| Carlos Jacott | Dr. Schulman | Ramon | 2 | 2 |
| Pat Finn | Chaz Montana, Paul | Joe Mayo | 3 | 1 |
| Sam Lloyd | Eddie | Ricky | 2 | 2 |
| Brenda Strong | Mrs. Frost | Sue Ellen | 2 | 4 |
| Bryan Cranston | Neil | Tim Whatley | 1 | 5 |
| Michael McShane | Phil | Franklin Delano Romanowski | 1 | 2 |
| Phil Hartman | Phillip, Randy | Man on Phone | 2 | 1 |
| Chip Chinery | Guy, Janitor, Maintenance Guy | Co-Worker #1 | 4 | 1 |
| Amy Hill | Rita | Kim | 1 | 1 |
| Bob Odenkirk | Gary | Ben | 1 | 1 |
| Everett Greenbaum | Norman | McMaines | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.