Actors in both Quantum Leap and Seinfeld
96 actors have appeared in both Quantum Leap and Seinfeld, across 275 episodes. The most-credited is Heidi Swedberg, Valerie Nevsky in Quantum Leap and Susan Ross in Seinfeld.
| Actor | In Quantum Leap | In Seinfeld | Eps | Eps |
|---|---|---|---|---|
| Heidi Swedberg | Valerie Nevsky | Susan Ross | 1 | 27 |
| Richard Herd | Moe Stein | Wilhelm | 2 | 12 |
| Patrick Warburton | Blaster | David Puddy | 1 | 10 |
| Warren Frost | Senator Weitzman | Mr. Ross | 1 | 5 |
| Reni Santoni | Staff Sergeant Lopez | Poppie | 1 | 4 |
| Brian George | Ben | Babu Bhatt | 1 | 3 |
| John D'Aquino | Frank LaMotta | Todd Gack | 3 | 1 |
| Teri Hatcher | Donna Eleese | Sidra | 1 | 3 |
| Kevin Page | Young Doctor | Stu Chermack | 1 | 6 |
| Michael D. Roberts | Isaac King, Willis Tyler | Roger Ipswich | 2 | 1 |
| Montrose Hagins | Matty | Old Woman, Woman in Theatre | 1 | 2 |
| Rance Howard | Doc Graves | Blind Man, Farmer | 1 | 2 |
| Susan Diol | Beth Calavicci | Audrey | 2 | 1 |
| Teri Austin | Dana Barrenger | Ava | 1 | 2 |
| Tracy Kolis | Lisa | Kelly, Marlene | 1 | 2 |
| Vaughn Armstrong | Father | Lt. Coleman | 1 | 2 |
| Angelo Tiffe | Carl Morgan | Delivery Man | 1 | 1 |
| Anna Gunn | Liz Lindhurst | Amy | 1 | 1 |
| Claude Earl Jones | Captain Elias | Mr. Bevilaqua | 1 | 1 |
| J.G. Hertzler | Weathers Farrington | Director | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.