All 130 actors in both ER and Mad Men
130 actors have appeared in both ER and Mad Men, across 423 episodes. The most-credited is John Aylward, Dr. Donald Anspaugh in ER and Geoffrey Atherton in Mad Men.
| Actor | In ER | In Mad Men | Eps | Eps |
|---|---|---|---|---|
| John Aylward | Dr. Donald Anspaugh | Geoffrey Atherton | 74 | 2 |
| Mark Moses | Mr. Marks | Herman "Duck" Phillips | 1 | 20 |
| Mädchen Amick | Wendall Meade | Andrea Rhodes | 10 | 1 |
| Anne Dudek | Paula Gamble | Francine Hanson | 1 | 16 |
| Mason Vale Cotton | Brian | Bobby Draper | 1 | 13 |
| Deborah Lacey | Det. Tincreed | Carla | 1 | 14 |
| Crista Flanagan | Pam | Lois Sadler | 1 | 9 |
| Cara Buono | Lisa Salamunovich | Faye Miller | 1 | 10 |
| Elizabeth Rice | Sara Pasbalas | Margaret Sterling | 1 | 10 |
| Kip Pardue | Nurse Ben Parker | Tim Jablonski | 6 | 2 |
| Ryan Cutrona | Wilson | Gene Hofstadt | 1 | 6 |
| Matthew Glave | Dr. Dale Edson | Bill Hartley | 15 | 1 |
| Andy Umberger | Dr. David Harvey | Dr. Arnold Wayne | 2 | 6 |
| Myra Turley | Monica Ford | Katherine Olson | 1 | 7 |
| Audrey Wasilewski | Officer Wetterling | Anita Olson Respola | 1 | 6 |
| Joe O'Connor | Mr. Scott | Tom Vogel | 1 | 6 |
| Channing Chase | Claire | Dorothy "Dot" Campbell | 4 | 5 |
| Brendan Patrick Connor | Paramedic Reidy | Officer Mott | 13 | 1 |
| Randee Heller | Mrs. Goldberg | Miss Blankenship | 1 | 6 |
| Alexis Bledel | Dr. Julia Wise | Beth Dawes | 1 | 3 |
| Brynn Horrocks | Mary Casey | Abigail Whitman | 1 | 7 |
| Michael Gaston | U.S. Marshal Rick Cromley | Burt Peterson | 1 | 4 |
| Patrick Fischler | Chamber Tech | Jimmy Barrett | 1 | 4 |
| Remy Auberjonois | Elliot | Dr. Emerson | 1 | 2 |
| Eric Ladin | Pvt. Thomas Perry | William Hofstadt | 1 | 4 |
| Gabriel Mann | Carl Twomey | Arthur Case | 1 | 4 |
| Joseph Culp | Roger | Archie Whitman | 1 | 4 |
| Missy Yager | Nicole Woodman | Sarah Beth | 1 | 4 |
| Megan Henning | Katie Milner | Judy Hofstadt | 1 | 3 |
| Troy Ruptash | Dave Fern | Lieutenant | 1 | 1 |
| Gregory Wagrowski | Walton, Herm Bullard | Dr. Oliver | 3 | 1 |
| Judy Kain | Thomas | Olive Healy | 1 | 3 |
| John Walcutt | Cancer Specialist | Franklin Newcomb | 2 | 1 |
| Mary Anne McGarry | Alice Wakely | Alice Cooper | 1 | 2 |
| Stephanie Courtney | Charlotte | Marge | 1 | 3 |
| Tim De Zarn | Mr. Krawczyk | Jim Anderson | 2 | 1 |
| Eve Gordon | Mrs. Nugent | Giselle | 1 | 1 |
| Marty Ryan | Brant | Richard Hanson | 2 | 1 |
| Robin Pearson Rose | Lois | Alice Geiger | 1 | 2 |
| Stewart Skelton | John Taylor | Colonel | 1 | 1 |
| Cathrine Grace | Mrs. Harrison, Ratkovich | Tootsie Yates | 2 | 2 |
| Carla Gallo | Emma Miller | Karen Ericson | 1 | 2 |
| David Warshofsky | Hostage Negotiator | Leonard Fillmore | 1 | 1 |
| Federico Dordei | Aldo | Fabrizio | 1 | 1 |
| Joanne Baron | Virgie | Saleswoman | 1 | 1 |
| Randy Oglesby | PICU Doctor | Walter Veith | 1 | 1 |
| Davenia McFadden | April Robinson, Mrs. Bevins | Ida | 2 | 1 |
| Jack Impellizzeri | Bartender, Man | Officer Hahn | 2 | 1 |
| Alan Blumenfeld | Rob Savage | George Rothman | 1 | 1 |
| Allan Miller | Bartholomew Lefkowitz | Abraham Menken | 1 | 1 |
| Christopher Allport | Mr. Strickland | Andrew Campbell | 1 | 1 |
| Irene Roseen | Inez | Lily Meyer | 1 | 1 |
| Katherine Boecher | Jenny | Annie | 1 | 1 |
| Lauri Johnson | Oncology Nurse | Carrie | 1 | 1 |
| Pat Skipper | Carl Dayton | Tom Pruitt | 1 | 2 |
| Ron Perkins | Mr. Elmore | Jim Hartsdale | 1 | 1 |
| Alyson Reed | Ginny | Ruth Harris | 1 | 1 |
| Cathy Lind Hayes | Elaine Gasner | Nurse Finnegan | 1 | 1 |
| Jack Kehler | Jail Officer | Morris Mann | 1 | 1 |
| James DuMont | Clemens | Walt Jarvis | 1 | 1 |
| Michael Chieffo | Dr. Harris | Jim Buckley | 1 | 1 |
| Paul Bartholomew | Mr. Burke | Bob Finley | 1 | 1 |
| Ann Ryerson | Hillary Lerner, Oncology Doctor | Elsa Kittridge | 2 | 1 |
| Alexa Nikolas | Megan Nesbitt | Wendy | 1 | 1 |
| Eileen Barnett | Dr. Robbins | Amelia Rosenberg | 1 | 1 |
| Hayley McFarland | Candice | Bonnie | 1 | 1 |
| J.D. Cullum | Munchausen Patient | George Casey | 1 | 1 |
| James Keane | Workman | Night Manager | 1 | 1 |
| Jayne Taini | Marge Satterfield | Nurse Elaine | 1 | 1 |
| Lou Richards | Perkins | Charles Butler Jr. | 1 | 1 |
| Norma Maldonado | Munoz | Celia | 2 | 1 |
| Brian Klugman | Russell | Judd | 1 | 1 |
| Carol Locatell | Landlady | Miss Wakeman | 1 | 1 |
| Kate McNeil | Mrs. Pendry | Edith Huff | 1 | 1 |
| Michael Dempsey | Mr. Beckwith | Marty Hasselbach | 1 | 1 |
| Sab Shimono | Dr. Okida | Ichiro Kamura | 1 | 1 |
| Sarah Benoit | Melanie | Vivian | 1 | 1 |
| Susan Krebs | Transplant Surgical Nurse | Cynthia | 1 | 1 |
| Bjørn Johnson | Mark Taylor | Klaus | 1 | 1 |
| David Bowe | Father of Unicycle Boy | Doctor Adams | 1 | 1 |
| Donald Sage MacKay | Detective Lash | Dr. Gosman | 1 | 1 |
| Henry LeBlanc | Bartender | Emcee | 1 | 1 |
| Jacqueline Hahn | Dr. Bazzano | Charlotte Stevens | 1 | 1 |
| Jeremy Overstreet | Quinn | Exec #3 | 2 | 1 |
| Jim Jansen | Neonatologist | Doctor Howlett | 1 | 1 |
| Josh Clark | Officer McCauly | Exec #1 | 1 | 1 |
| Lisa K. Wyatt | Transpo Tech | Brenda | 1 | 1 |
| Mark Hutter | Mark's Doctor | Ross McCarthy | 1 | 1 |
| Patti Tippo | Debby | Mrs. Conyers | 1 | 1 |
| Richard Fancy | Mr. Thomas | Max Rosenberg | 1 | 1 |
| Peter MacKenzie | Mr. Pasbalas | Cliff Perry | 1 | 1 |
| Dan Byrd | Russ | Wayne Barnes | 1 | 1 |
| John Thaddeus | Keith Nelson | Driver | 1 | 1 |
| Ken Meseroll | Mr. Sawyer | Herb Emmert | 1 | 1 |
| Mari Weiss | Vicki | Cecillia | 1 | 1 |
| Steve Stapenhorst | Thorn | Hunt Schilling | 1 | 1 |
| Steven M. Gagnon | Dr. Blum | Middle-Aged Man | 1 | 1 |
| Frank Novak | Ted | Curtis | 1 | 1 |
| Geoffrey Wade | Darrell Amos | Dr. Leonard | 1 | 1 |
| Jareb Dauplaise | Chris Hawkins | Richard Duffy | 1 | 1 |
| Karimah Westbrook | Sara Morris | Sharon | 1 | 1 |
| Lonnie Hughes | Gary | Delivery Man | 1 | 1 |
| Maura Soden | Miranda | Nurse Wilson | 1 | 1 |
| Norma Michaels | Rose Franklin | Older Woman | 1 | 1 |
| Susan Grace | Gloria | Delia | 1 | 1 |
| Vaughn Armstrong | Greg Mitchell | Shel Keneally | 1 | 1 |
| Annie Campbell | Joanna | Kibby | 1 | 1 |
| Brian Catalano | Officer Cash | Man 1 | 1 | 1 |
| Jay Burns | Arthur | Bulldog Man | 1 | 1 |
| Anne Bellamy | Dottie | Elderly Woman | 1 | 1 |
| MaryKathleen Gordon | Rose | Nurse | 1 | 1 |
| Toni Torres | Lorraine | Lucy | 1 | 1 |
| Alyson Croft | Gina | Stacy | 1 | 1 |
| Barbara Tarbuck | Alice Presley | Hazel Tinsley | 1 | 1 |
| Gary Ballard | Arnold Plum | Waiter | 1 | 1 |
| Rick Zieff | How Ya Doin' Guy | Dr. Shelly Hecht | 1 | 1 |
| Steven Lee Allen | Contractor | Jack Wyler | 1 | 1 |
| Billy Finnigan | Salter | College Boy | 1 | 1 |
| Daniel Kountz | Reed Silvan | Gary Osborn | 1 | 1 |
| Michael Sollenberger | Tomkins | Raymond Dunst | 1 | 1 |
| Ross Mackenzie | Fred | Joe Harriman | 1 | 1 |
| Rod McLachlan | Tohill | Terry | 1 | 1 |
| Mary-Margaret Lewis | Maid | Receptionist | 1 | 1 |
| Ricardo J. Chacon | Eddie | Deliveryman | 1 | 1 |
| Sewell Whitney | Tech | Bandleader | 1 | 1 |
| William Martin Brennan | Herbert | Exec #2 | 1 | 1 |
| Jesse James | Wilson Geary | Zal | 1 | 1 |
| Pamela Shaddock | Reporter Winslow | Loretta | 1 | 1 |
| Wes Robinson | Grant | Danny | 1 | 1 |
| Angela Sargeant | Shannon | Other Woman | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.