All 51 actors in both Columbo and M*A*S*H
51 actors have appeared in both Columbo and M*A*S*H, across 320 episodes. The most-credited is William Christopher, Male Scientist in Columbo and Father John Patrick Francis Mulcahy in M*A*S*H.
| Actor | In Columbo | In M*A*S*H | Eps | Eps |
|---|---|---|---|---|
| William Christopher | Male Scientist | Father John Patrick Francis Mulcahy | 1 | 61 |
| John Orchard | Country Constable Charlie | Capt. 'Ugly John' Black, Muldoon | 1 | 10 |
| Bruce Kirby | Sgt. George Kramer, Lab Attendant, Sgt. Phil Brindle | Sergeant Kimble | 9 | 1 |
| Edward Winter | Charlton "Charlie" Chambers | Colonel Samuel Flagg, Capt. Halloran | 1 | 7 |
| Joshua Bryant | Dr. MacMurray, Wayne Taylor | Sergeant Jerry Scully | 2 | 3 |
| Mako | Kanji Ousu | Dr. Lin Tam, Li Han, Lt. Hung Lee Park | 1 | 4 |
| Robert F. Simon | Dr. Westrum | Gen. Maynard M. Mitchell | 1 | 3 |
| Lynette Mettey | Gloria Jr. | Lt. Nancy Griffin, Nurse Able, Nurse Baker | 1 | 6 |
| Ed Begley Jr. | Irving Krutch, Officer Stein | Pvt. Paul Conway | 2 | 1 |
| Leslie Nielsen | A.J. Henderson, Peter Hamilton | Col. Buzz Brighton | 2 | 1 |
| Mariette Hartley | Eileen McRae, Veronica | Dr. Inga Halvorsen | 2 | 1 |
| William Bogert | Randall Thurston | Capt. Maurice Allen, Rodger Prescott | 1 | 2 |
| Buck Young | Guard, Guest at Wake | Dan, M.P., O'Brien | 2 | 3 |
| Denice Kumagai | Martha | Denice Kumagai | 1 | 1 |
| Don Eitner | Pete Cockrum | Captain | 1 | 1 |
| Michael McManus | Tanzer | Sgt. Ames | 1 | 1 |
| Peter Jurasik | Dr. Simon Ward | Capt. Triplett | 1 | 1 |
| Sorrell Booke | Bertie Hastings, J.J. Stringer | Gen. Wilson Spaulding Barker | 2 | 2 |
| William Lucking | Dominic Doyle | Sgt. Marty Urbancic | 1 | 1 |
| Charles Frank | Edmund Galvin | Captain Hathaway, Lieutenant Martinson | 1 | 2 |
| Pat Morita | The House Boy | Capt. Sam Pak | 1 | 2 |
| Tim O'Connor | Edward Lytton, Michael Hatheway | Colonel Spiker | 2 | 1 |
| Alan Fudge | David Chase, Mr. Harrow, Mr. Redman | Captain Arnold Chandler | 3 | 1 |
| Antony Alda | Mario DeLuca | Corporal Jarvis | 1 | 1 |
| Basil Hoffman | Jason Danziger | Bartruff, Major Pfiefer | 1 | 2 |
| Blythe Danner | Janice Benedict | Carlye Breslin Walton | 1 | 1 |
| Dennis Robertson | 1st Reporter, Detective Marley, Jerry | Lt. Michael Harper | 3 | 1 |
| George Wyner | Film Editor | Benson | 1 | 1 |
| James Gregory | Coach Rizzo, David L. Buckner | Lt. Gen. Robert 'Iron Guts' Kelly | 2 | 1 |
| John Randolph | The Colonel | General Haggerty | 1 | 1 |
| Robert Karnes | Grover, Sgt. Vernon | Colonel | 2 | 1 |
| Tad Horino | Gardner Ando Miaki | 1st Korean Kim Luc, Bartender | 1 | 2 |
| Bart Braverman | 2nd Picketer | Private Habib | 1 | 1 |
| Frank Aletter | Dr. Ernie Garrison | Maj. Stoner | 1 | 1 |
| George Wendt | Graham McVeigh | Pvt. La Roche | 1 | 1 |
| Kathleen King | Suzy | Nurse Beddoes | 1 | 1 |
| Peter Zapp | Mayor's Aide | Rifkin | 1 | 1 |
| Ted Gehring | Security Guard | Major Arnold Morris | 1 | 1 |
| Redmond Gleeson | Arnold, George Thomas | Sergeant Callan | 2 | 1 |
| Alan Manson | Sid Daley | Colonel Hersh | 1 | 1 |
| Burt Young | Mo Weinberg | Lt. Willis | 1 | 1 |
| Dennis Dugan | Sgt. Theodore 'Mac' Albinsky | Pvt. Danny McShane | 1 | 1 |
| Jack Riley | Director | Capt. Kaplan | 1 | 1 |
| Sandy Kenyon | Harris | Woodruff | 1 | 1 |
| Alex Henteloff | Pawnbroker | Captain Casey | 1 | 1 |
| Bruno Kirby | Cadet Morgan | Pvt. Lorenzo Boone | 1 | 1 |
| Anthony Holland | Darryl | Captain Hildebrand | 1 | 1 |
| Mary Wickes | Landlady | Colonel Reese | 1 | 1 |
| Raymond Singer | Dentist | Dr. Berman | 1 | 1 |
| Tony Cristino | Stickman | Sergeant LaGrow | 1 | 1 |
| Paul Jenkins | Sergeant Douglas | Sergeant Baker | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.