Actors in both ER and Veronica Mars
67 actors have appeared in both ER and Veronica Mars, across 403 episodes. The most-credited is Michael Muhney, Colin Prentice in ER and Sheriff Don Lamb in Veronica Mars.
| Actor | In ER | In Veronica Mars | Eps | Eps |
|---|---|---|---|---|
| Michael Muhney | Colin Prentice | Sheriff Don Lamb | 1 | 18 |
| Erica Gimpel | Adele Newman | Alicia Fennel | 19 | 8 |
| Christopher B. Duncan | Matthew Graham | Clarence Wiedman | 1 | 8 |
| Cress Williams | Officer Reggie Moore | Nathan Woods | 14 | 4 |
| Mary McDonnell | Eleanor Carter | Jane | 5 | 1 |
| James Molina | Santiago Tabajas | Thumper | 1 | 8 |
| Marcello Thedford | Leon | Super Huge Deputy | 7 | 2 |
| Alex Solowitz | James / "Mr. Midnight" | Tyler Carr | 1 | 4 |
| Onahoua Rodriguez | Alma | Claudia | 1 | 4 |
| Jeffrey D. Sams | Dr. Dorsey Watson | Terrence Cook | 1 | 5 |
| Kyla Pratt | Lily | Georgia | 1 | 1 |
| Linda Castro | Guerrero | Mrs. Murphy | 1 | 9 |
| Christian Clemenson | Dr. Kurtag | Abel Koontz | 1 | 4 |
| Michelle Wolff | Firefighter Rillo | Female Deputy | 1 | 2 |
| Jessica Chastain | Dahlia Taslitz | Sarah Williams | 1 | 1 |
| Megalyn Echikunwoke | Terry Welch | Rain | 1 | 1 |
| Kari Coleman | Mona | Deborah Hauser | 1 | 3 |
| François Chau | Neuro Resident | Hu | 2 | 1 |
| Alanna Ubach | Terry's Friend | Silvia | 1 | 1 |
| Annie Campbell | Joanna | Molly Fitzpatrick | 1 | 3 |
Cast data from TVmaze, licensed CC BY-SA 4.0.