All 56 actors in both ER and Northern Exposure
56 actors have appeared in both ER and Northern Exposure, across 441 episodes. The most-credited is John Aylward, Dr. Donald Anspaugh in ER and Charles 'Red' Murphy, Businessman in Northern Exposure.
| Actor | In ER | In Northern Exposure | Eps | Eps |
|---|---|---|---|---|
| John Aylward | Dr. Donald Anspaugh | Charles 'Red' Murphy, Businessman | 74 | 3 |
| Diane Delano | Stella Willis, Delores | Officer Barbara Semanski | 5 | 12 |
| Christine Elise | Harper Tracy | Cyndy Rincon | 15 | 1 |
| Donal Logue | Flight Nurse Chuck Martin | Judd Bromell | 11 | 1 |
| Valerie Mahaffey | Joi Abbott | Eve | 4 | 5 |
| Bibi Besch | Ethel Garvey | Jane O'Connell | 1 | 2 |
| Heidi Swedberg | Robin Turner | Linda | 2 | 1 |
| Peg Phillips | Mrs. Duffy | Ruth-Anne Miller, Rhoda | 1 | 4 |
| Art LaFleur | Miles Kearney | Walter | 1 | 1 |
| Megan Cole | Pathologist Dr. Upton | Anita | 7 | 1 |
| Ralph P. Martin | Woody | Ivory Springer | 1 | 3 |
| Simon Templeman | Gareth | Cal Ingraham | 1 | 4 |
| Jo Anderson | Mrs. Cunningham | Jane Harris, Roslyn | 1 | 2 |
| Sam Vlahos | Pablo | Two-Clocks | 8 | 1 |
| John LaMotta | Ivan Gregor | Salvatore D'Angelo | 4 | 1 |
| Bill Cobbs | Mr. Bowman | Angelo Maxwell | 1 | 1 |
| Douglas Rowe | Dr. Arndt | Man from Kansas, Ricky | 1 | 2 |
| Gabriel Salvador | Eddie | Tellakutan | 1 | 1 |
| John Hawkes | P.A. | Jason | 1 | 1 |
| Mark Pellegrino | Nathan Conley | Rolf Hauser | 1 | 1 |
| Valerie Perrine | Cookie Lewis | Jackie Vincoeur | 2 | 1 |
| Debra Mooney | Leila Morgan, Barbara Feingold | Jane Stowe O'Connell | 3 | 1 |
| Wayne Péré | Eric Farve | Prof. Bob Pickering | 1 | 2 |
| Cindy Lu | Chinese Woman | Receptionist | 1 | 1 |
| Jim Haynie | Opthalmologist | Gillis Toomey | 1 | 1 |
| Micole Mercurio | Marguerite Janeway | Ellen | 1 | 1 |
| Peter Murnik | Officer Mulvahill | Bob Miller | 1 | 1 |
| Sean G. Griffin | Dr. Frost | Surgeon | 1 | 1 |
| David Spielberg | Dr. Neil Bernstein | Professor Dick Schuster | 4 | 1 |
| Jillian Armenante | Tamara Gordon | Chef's Assistant, Olympias | 1 | 2 |
| Allan Miller | Bartholomew Lefkowitz | Elijah | 1 | 1 |
| Beth Broderick | Edith Landry | Linda Angelo | 1 | 1 |
| Darryl Fong | Mr. Chang | Kim Cheng | 1 | 1 |
| Fred Applegate | Gus's Father | P.W. Stevens, Jr. | 1 | 1 |
| Maureen Flannigan | Mrs. Gamble | Miranda (age 18) | 1 | 1 |
| Norbert Weisser | Dr. Adler | Reinhart | 1 | 1 |
| Rob Narita | Miyamoto | Japanese Tourist | 1 | 1 |
| Scott Paulin | Dr. Kirsch | Lance Bristol | 1 | 1 |
| Anne Haney | Mrs. Packer | Judge Elizabeth Percy | 1 | 1 |
| Cathryn de Prume | Andrea Bryson | Joanne | 1 | 1 |
| Clement von Franckenstein | Mr. Darcy | Jean Jacques Vincoeur | 1 | 1 |
| Dennis Cockrum | Little League Player's Father | Auctioneer | 1 | 1 |
| Hank Stratton | Curt Oberg | Lieutenant Commander Dr. Pete Melon | 1 | 1 |
| Jack Kehler | Jail Officer | Dust Mite | 1 | 1 |
| Jared Rushton | Andy Bohlmeyer | Phil | 1 | 1 |
| Lisa Waltz | Mrs. Wimbur | Stephie O'Connell | 1 | 1 |
| Ron Perkins | Mr. Elmore | Trooper | 1 | 1 |
| Ronald Hunter | Juror Two | Ernie | 1 | 1 |
| Time Winters | Emil Savka | Emile | 1 | 1 |
| David McSwain | Mr. Urbanski | Cliff Zweibel | 1 | 1 |
| Jack Blessing | Roger Drummond | Professor Aaron Martin | 1 | 1 |
| Lisa Darr | Nadine Wilkes | Ann McGrath | 1 | 1 |
| Lois Foraker | Ida Blinnder | Edna | 1 | 1 |
| Pat Millicano | Mr. Hahn | Gary | 1 | 1 |
| Philippe Bergeron | European | Henri Pepin | 1 | 1 |
| Remy Ryan Hernandez | Harried Clerk | Nina Gould | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.