All 159 actors in both ER and Quantum Leap
159 actors have appeared in both ER and Quantum Leap, across 426 episodes. The most-credited is CCH Pounder, Dr. Angela Hicks in ER and Mama Harper in Quantum Leap.
| Actor | In ER | In Quantum Leap | Eps | Eps |
|---|---|---|---|---|
| CCH Pounder | Dr. Angela Hicks | Mama Harper | 24 | 1 |
| Kathleen Wilhoite | Chloe Lewis | Norma Jean Pilcher | 19 | 1 |
| Michael Beach | Al Boulet | Nathaniel Simpson | 19 | 1 |
| John Cullum | David Greene | John O'Malley | 15 | 1 |
| Liz Vassey | Liz | Barbara Whitmore, Paula Fletcher | 4 | 2 |
| Carolyn Seymour | Dr. Skoft | Zoey, Miss Stoltz | 1 | 4 |
| Meg Foster | Mrs. Hall | Laura Fuller | 1 | 3 |
| Mike Genovese | Officer Al Grabarsky | Don Geno Frascotti, Mr. Collins | 12 | 2 |
| Angelo Tiffe | Mr. Klingman, Tom Putnam | Carl Morgan | 2 | 1 |
| Anne Haney | Mrs. Packer | Cassy Thailer, Grace Beaumont | 1 | 2 |
| Fran Bennett | Michelle, Phyllis | Marie Billings, Ada Simpson | 2 | 4 |
| Liz Torres | Sarah Wilson | Angelita Carmen Guadalupe Cecelia Jimenez | 2 | 1 |
| Raphael Sbarge | Mr. Kirkendall | Will | 2 | 1 |
| Richard Herd | Dr. Murphy | Moe Stein | 1 | 2 |
| Robert Gossett | Dr. Everett Daniels | Charles Griffin | 2 | 1 |
| Valerie Mahaffey | Joi Abbott | Mary Greely | 4 | 1 |
| Amy Ryan | Sister Elizabeth | Libby McBain | 1 | 1 |
| Anna Gunn | Ikabo's Lawyer | Liz Lindhurst | 1 | 1 |
| Diane Delano | Stella Willis, Delores | Prostitute | 5 | 1 |
| Jennifer Rhodes | Mrs. Henry | Agnes Stevens | 1 | 1 |
| John Kapelos | Mr. Irby | Dr. Mustafa El Razul | 1 | 1 |
| K Callan | Kelly Robinson | Lenore Mackenzie | 1 | 1 |
| Nancy Stafford | Alan's Mom | Peg Myers | 1 | 1 |
| Rance Howard | Dr. Oliver Kostin | Doc Graves | 1 | 1 |
| Shay Astar | Amy Thompson | Mary Elroy | 1 | 1 |
| Terri Garber | Dr. Alexander | Teresa Pacci | 1 | 1 |
| William Schallert | Mitchell Jennings | Judge Eugene Haller | 1 | 1 |
| David Allen Brooks | Dr. Gunn | Clint Beaumont | 2 | 1 |
| George Wyner | Rabbi | Ben Harris | 2 | 1 |
| Jon Gries | Defense Attorney Marty Nesmith | Flash McGrath, Roscoe | 1 | 2 |
| Pat Skipper | Carl Dayton | Luke Marlet, Tequila | 1 | 2 |
| Richard Riehle | Mandrake Patient | Clifford Vargas, Lieutenant Lannon | 1 | 2 |
| Dwier Brown | Dr. David Herlihy | Neil Walters | 3 | 1 |
| Stephen Lee | Mr. Dressler | Bo Loman | 1 | 3 |
| Harrison Page | Stan | Reverend Walters | 4 | 1 |
| Tyra Ferrell | Dr. Sarah Langworthy | Delilah 'Lila' Berry | 6 | 1 |
| Angela Paton | Mrs. Ransom | Lottie Sammis | 1 | 1 |
| Bill Marcus | Mr. Biggers | Captain Vincent | 1 | 1 |
| Christopher Allport | Mr. Strickland | Alan Ripley | 1 | 1 |
| Deborah Van Valkenburgh | Louise Gavin | Diana St. Cloud | 1 | 1 |
| Glenn Morshower | Rick Decoyte | Grady | 1 | 1 |
| Gregory Itzin | Burn Doctor | Sam Phillips | 1 | 1 |
| Heidi Swedberg | Robin Turner | Valerie Nevsky | 2 | 1 |
| James Handy | Dan Sullivan | Ross Tyler | 1 | 1 |
| Jim Haynie | Opthalmologist | Sheriff John Hoyt | 1 | 1 |
| Kate McNeil | Mrs. Pendry | Olivia Barrett Covington | 1 | 1 |
| Kenneth Tigar | Dr. Keinholz | Ben Steiner | 2 | 1 |
| Lisa Darr | Nadine Wilkes | Ginny Will | 1 | 1 |
| Louis Mustillo | Steve O'Brien | Mario | 1 | 1 |
| Michael Fairman | Mort Harris | Judge Mulhearn | 1 | 1 |
| Michael McGrady | Fire Captain Davis | Oscar | 1 | 1 |
| Nancy Lenehan | Edie Harvell | Colleen McBain | 1 | 1 |
| Peter Onorati | Officer Nick Napolitano | Rick | 1 | 1 |
| Robert Costanzo | Pernicious Anemia Man | Chuck Thompson | 1 | 1 |
| Scott Lawrence | Children's Services Rep | Tibby Johnson | 1 | 1 |
| Sherman Howard | Mr. Schoenberger | Hank Rickett | 1 | 1 |
| Tom Everett | Mr. Kazlaw | Deputy Sheriff Hazlitt | 1 | 1 |
| Gregory Millar | Mr. Smiley | Lonnie Harper, Pusher | 1 | 2 |
| Amanda Wyss | Mrs. Adams | Suzanne Elsinger | 1 | 1 |
| Basil Wallace | Mr. Campbell | Jasper "Jazz" Boone | 1 | 1 |
| Christian Hoff | Med Student | Philip Silbart | 1 | 1 |
| Daniel Roebuck | Kyle Martin | Neil Lindhurst | 1 | 1 |
| Deborah Strang | Mrs. Drane | Aggie | 1 | 1 |
| Eileen Seeley | Mrs. Maryanski | Karen Marlet | 1 | 1 |
| Erich Anderson | Mr. Bradley | Steve Slater | 1 | 1 |
| Frances Bay | Georgia | Millie Reynolds | 1 | 1 |
| Frank Roman | Dr. Olivas | Hector | 1 | 1 |
| James Sutorius | Dr. Abrams | Joe Basch | 1 | 1 |
| John Apicella | Mr. Etheridge | Sheriff Dixon | 1 | 1 |
| Judith Hoag | Mrs. Brenner | Julie Miller | 1 | 1 |
| Lisa Waltz | Mrs. Wimbur | Lilly | 1 | 1 |
| Michael Gregory | Westbrook | Colonel Wojohowitz | 1 | 1 |
| Neil Giuntoli | Alan | Private Ryder | 1 | 1 |
| Ron Taylor | Bob | Papa David Harper | 1 | 1 |
| Tom La Grua | Mr. Leonelli | Joey | 1 | 1 |
| Jeanette Miller | Beverly, Flora | Old Lady | 2 | 1 |
| Sam Scarber | Mr. Parnell, Willy Archibald | Warden Clifton Meyers | 2 | 1 |
| Ali Dean | Cab Driver | Gamal | 1 | 1 |
| Bette Rae | Mrs. Gottschuck | Mrs. Little | 1 | 1 |
| Bill Calvert | Psych Intern | Peter Tipton | 1 | 1 |
| Connie Ray | Glenda | Carol Pruitt | 1 | 1 |
| Dan Ziskie | Melissa Harold's Father | Sergeant Riley | 1 | 1 |
| David Hayward | Mr. Brodie | Dempsey | 2 | 1 |
| Denise Gentile | Botox Lady | Janelle | 1 | 1 |
| Dirk Blocker | Mr. Groder | Tom | 1 | 1 |
| Erica Yohn | Ann Reilly | Rose Montachelli | 1 | 1 |
| Gene Lythgow | Cop | Holt | 1 | 1 |
| Jack Orend | Kyle | Tony | 1 | 1 |
| James McDonnell | Pat Guinet | Jonathan | 1 | 1 |
| Judy Kain | Thomas | Waitress | 1 | 1 |
| Lorinne Vozoff | Marguerite | Mary Walters | 1 | 1 |
| Michael Manasseri | Michael Kenny | Jerry | 1 | 1 |
| Penny Fuller | Mrs. Constantine | Jane Lindhurst | 1 | 1 |
| Peter Murnik | Officer Mulvahill | Welles | 1 | 1 |
| Robert Symonds | Admiral Jay Jackson | Dr. Wickless | 1 | 1 |
| Terri Hanauer | Mrs. Haggerty | Irene Basch | 1 | 1 |
| Tim De Zarn | Mr. Krawczyk | Stan | 2 | 1 |
| Todd Merrill | Jagman | Brian | 1 | 1 |
| Tom McTigue | Leland | Calloway | 1 | 1 |
| Travis McKenna | Mr. DeMisa | Deputy Sheriff Sutton | 1 | 1 |
| Dona Hardy | Freda, Harriet | Gray Haired Lady | 2 | 1 |
| Michael Bryan French | Dr. MacGruder | Jack Kerouac | 2 | 1 |
| Cameron Dye | Damian's Dad | Leon Stiles | 1 | 1 |
| Cynthia Mann | Margie Stein | Girl | 1 | 1 |
| Jeanine Jackson | Elise Stevens | Kelly | 1 | 1 |
| Jeffrey King | Detective | Luke | 1 | 1 |
| Larry Brandenburg | Mr. Lensky | Commander Hugh Dobbs | 1 | 1 |
| Marjorie Lovett | Colostomy bag lady | Unabelle | 1 | 1 |
| Michael Alldredge | Ray's Dad | Charlie Samuels | 1 | 1 |
| Peter Spears | Harris | Doug Bridges | 1 | 1 |
| Tom Silardi | Pino | Segundo La Palma | 1 | 1 |
| Tripp Law | Mr. Fuhrbusch | Nubian Guard | 1 | 1 |
| Brian Haley | Chris Salamunovich | Guna | 1 | 1 |
| Ellen Albertini Dow | Mrs. Riblet | Grandma | 1 | 1 |
| Jarrett Lennon | Billy | Tiny Boy | 1 | 1 |
| Jeff Corbett | Mike Dodds | Ensign "Chip" Ferguson | 1 | 1 |
| John Christian Graas | Max Nielsen | Small Boy | 1 | 1 |
| Matt Landers | Mr. Travels | Richard | 1 | 1 |
| Myra Turley | Monica Ford | Delores | 1 | 1 |
| Pat Crawford Brown | Mrs. Votey | Woman | 1 | 1 |
| Paul Collins | Dr. Norm Middleton | Rob Jackson | 1 | 1 |
| Paul Scherrer | Gardner | Jack | 1 | 1 |
| Ralph Monaco | Mr. Specchierla | Hal | 1 | 1 |
| Richard Grove | Ed | Mark LeJeune | 1 | 1 |
| Roz Witt | Saleswoman | Waitress | 1 | 1 |
| Terrence Evans | Barry Mahoney | Stick | 1 | 1 |
| Vaughn Armstrong | Greg Mitchell | Father | 1 | 1 |
| Javi Mulero | Deltorre | Taco Man | 2 | 1 |
| Charles Emmett | Derezin | Officer Arden | 1 | 1 |
| Maggie Egan | Kathleen Horne | Margaret Cole | 1 | 1 |
| Nigel Gibbs | Matson | Waiter | 1 | 1 |
| Phyllis Lyons | Mrs. Tubbs | Annie Beaumont | 1 | 1 |
| Robby Sutton | Holden | Young Soldier | 1 | 1 |
| Tony Maggio | Clayton | Tony | 1 | 1 |
| Adam Nelson | Police Officer | Preacher | 1 | 1 |
| Doreene Hamilton | ICU Nurse | Anita's Friend | 1 | 1 |
| Kristopher Logan | Lobster Man | Bone | 1 | 1 |
| Michael McCarty | Gerry Gugliemotto | Jack | 1 | 1 |
| Patrick Cranshaw | Man with walker, Mr. Gilman | Old Man | 2 | 1 |
| Ric Mancini | Gasmer | Other Al | 1 | 1 |
| Scott Menville | Beidermeier | Cameron Wilson | 1 | 1 |
| David McSwain | Mr. Urbanski | Vet | 1 | 1 |
| Eve Brenner | Wilma | Madeline | 1 | 1 |
| Mary Pat Gleason | Anne Parks | Mrs. Thompson | 1 | 1 |
| Mik Scriba | James' Father | Coach Donnelly | 1 | 1 |
| Brian Leckner | Lloyd | Frat Boy | 1 | 1 |
| Charles M. Dugan | Mr. Risse | Stan Pierce | 1 | 1 |
| Frank Novak | Ted | Lou | 1 | 1 |
| James Gleason | Garrett Palsey | Roger | 1 | 1 |
| Montrose Hagins | Mrs. Olson | Matty | 1 | 1 |
| Barbara Tarbuck | Alice Presley | Esther | 1 | 1 |
| James C. Victor | Patrick | Carl Wilkens | 1 | 1 |
| John Hostetter | Burke Newton | Burt | 1 | 1 |
| Cal Gibson | Kim Tadlock | Gardener | 1 | 1 |
| Kevin McDermott | Gunderson | Kruger | 1 | 1 |
| Patty Toy | Dr. Leung | Bar Girl | 1 | 1 |
| Dafidd McCracken | Freund | Muleteer | 1 | 1 |
| Dennis Fimple | Dante | Red Norton | 1 | 1 |
| Philip McNiven | Psych Orderly | PFC Briggs | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.