Actors in both 3rd Rock from the Sun and ER
126 actors have appeared in both 3rd Rock from the Sun and ER, across 470 episodes. The most-credited is John Aylward, Chancellor, Registrar in 3rd Rock from the Sun and Dr. Donald Anspaugh in ER.
| Actor | In 3rd Rock from the Sun | In ER | Eps | Eps |
|---|---|---|---|---|
| John Aylward | Chancellor, Registrar | Dr. Donald Anspaugh | 2 | 74 |
| David DeLuise | Bug Pollone | Brad Anderson | 44 | 1 |
| Chad Einbinder | Rico, Police Officer | Gordan | 12 | 1 |
| David Brisbin | Professor Brandon | Dr. Alexander Babcock | 1 | 19 |
| Shay Astar | August Leffler | Amy Thompson | 7 | 1 |
| Marianne Muellerleile | Lucy | Mrs. Jarnowski | 6 | 1 |
| J.P. Manoux | Clerk | Dr. Dustin Crenshaw, Mime | 1 | 24 |
| Justin Urich | Romano | Corky | 4 | 1 |
| John Mahoney | Dr. Leonard Hanlin | Bennett Cray | 1 | 1 |
| Michael McShane | Phil | Hugo | 1 | 1 |
| Miguel Ferrer | Jack | Mr. Parker | 1 | 1 |
| Cathrine Grace | Veronica | Mrs. Harrison, Ratkovich | 1 | 2 |
| Jennifer Rhodes | Mrs. Sumner | Mrs. Henry | 4 | 1 |
| Dennis Cockrum | Colonel Pinkham | Little League Player's Father | 1 | 1 |
| Diane Delano | Lorraine | Stella Willis, Delores | 1 | 5 |
| Eugene Elman | Stan | Jerry | 1 | 1 |
| Jim Jansen | Mr. Gindek | Neonatologist | 1 | 1 |
| Katherine LaNasa | Kate | Janet Wilco | 1 | 1 |
| Kathleen Garrett | Celia | Mrs. Meeker | 1 | 1 |
| Michael Dempsey | Security Guard | Mr. Beckwith | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.