All 51 actors in both Hawaii Five-O and M*A*S*H
51 actors have appeared in both Hawaii Five-O and M*A*S*H, across 535 episodes. The most-credited is Soon-Tek Oh, Chaing, David Chung, Lao in Hawaii Five-O and Joon-Sung, Korean Soldier, Mr. Kwang in M*A*S*H.
| Actor | In Hawaii Five-O | In M*A*S*H | Eps | Eps |
|---|---|---|---|---|
| Soon-Tek Oh | Chaing, David Chung, Lao | Joon-Sung, Korean Soldier, Mr. Kwang | 7 | 5 |
| John Orchard | Joe Quillian | Capt. 'Ugly John' Black, Muldoon | 1 | 10 |
| Allan Arbus | Vince Maynard | Maj. Sidney Freedman, Maj. Milton Freedman | 1 | 6 |
| Andrew Duggan | Miller, Cliff Morgan, Dr. Karl Rathman | Col. Alvin 'Howitzer' Houlihan | 6 | 1 |
| Philip Ahn | Attorney General, Lin Mai-Lu, Quon Li | Korean Grandfather, Mr. Kim, The Father | 3 | 3 |
| Loretta Swit | Wanda Russell, Anna, Betty Landers | Major Margaret J. "Hot Lips" Houlihan | 4 | 7 |
| Mako | Kazuo Tahashi | Dr. Lin Tam, Li Han, Lt. Hung Lee Park | 1 | 4 |
| Joshua Bryant | Joe Boyd | Sergeant Jerry Scully | 1 | 3 |
| Patrick Adiarte | David | Ho-Jon | 1 | 7 |
| Robert F. Simon | Hugh Tilles | Gen. Maynard M. Mitchell | 1 | 3 |
| Ed Flanders | Dr. Alexander Kline, Bernie Ross, Byers | Lt. Dwayne Bricker | 7 | 1 |
| Alan Fudge | Ben Dawson, Joe Burdick, Paul Hamilton | Captain Arnold Chandler | 4 | 1 |
| Denny Miller | John Hayes | Military Policeman | 1 | 1 |
| Gail Strickland | Forbes | Capt. Helen Whitfield | 1 | 1 |
| Gerald S. O'Loughlin | Carl Swanson, Charlie Swanson, Sam Kavanaugh | Gen. Franklin Schwerin | 3 | 1 |
| Greg Mullavey | Cerberus | Capt. Tom Greenleigh | 1 | 1 |
| John McLiam | Ralph Hastings | Col. Woody Cooke | 1 | 1 |
| Larry Wilcox | Mike | Mulligan | 1 | 1 |
| Robert Hogan | Martin Rogers | Smilin' Jack | 1 | 1 |
| Stefan Gierasch | Sergei Borzov | Colonel Ditka | 1 | 1 |
| William Watson | Don Hobart, L.B. Barker, Marcus Lucien | Lt. Smith | 3 | 1 |
| Clyde Kusatsu | Jerry Quan | Kwang Duk | 1 | 2 |
| James Gregory | Jonathan Kaye, Mike Finney | Lt. Gen. Robert 'Iron Guts' Kelly | 2 | 1 |
| James Sikking | George Cameron, Oscar Ross | Finance Officer | 2 | 1 |
| John Ritter | Mike Welles, Ryan Moore | Pvt. Carter | 2 | 1 |
| Leslie Nielsen | Brent, Colonel Farraday | Col. Buzz Brighton | 2 | 1 |
| Pat Morita | Phoebe | Capt. Sam Pak | 1 | 2 |
| Tim O'Connor | Jonathan Kaye, Sheldon Orwell | Colonel Spiker | 2 | 1 |
| John Fujioka | Andrew Shibata, Kayata | Colonel Kim, Duc Phon Jong | 2 | 2 |
| Keye Luke | Senator John Oishi | Cho Kim, Choi Sung Ho, Mr. Shin | 1 | 3 |
| Charles Frank | Todd Seymour | Captain Hathaway, Lieutenant Martinson | 1 | 2 |
| Frank Marth | Jack Gibbons | Colonel Griswald | 1 | 1 |
| George Wyner | Allen Sherick | Benson | 1 | 1 |
| Helen Funai | Margo Lawrence, Riah Barlow | Betty Lou | 2 | 1 |
| Hope Summers | Minnie Leona Moroney | Nurse Meg Cratty | 1 | 1 |
| Jack Soo | Sam Quong | Charlie Lee, Kim Chung Quoc | 1 | 2 |
| Joan Van Ark | Freda Cowan | Lt. Erica Johnson | 1 | 1 |
| Leonard Stone | Herman Stein | Colonel Bidwell | 1 | 1 |
| Ned Beatty | Keith Caldwell | Col. Hollister | 1 | 1 |
| Titos Vandis | President Utomo Jhakal | Col. Andropolis | 1 | 1 |
| Keene Curtis | Professor Dobbs Burke, Vincent Gordon | Colonel Wortman | 2 | 1 |
| James Wainwright | Richard Royce | Colonel Lacy | 1 | 1 |
| Lawrence Pressman | Calvin Cutler | R.T. Williamson | 1 | 1 |
| Logan Ramsey | Edmund Putney | Colonel Lambert | 1 | 1 |
| Miko Mayama | Nora Kayama | Sun | 1 | 1 |
| Richard Masur | Bink Avery | Lt 'Digger' Detweiler | 1 | 1 |
| Susie Elene | Asuko | Mai Ping | 1 | 1 |
| Edward Binns | Mills | General Korshak | 1 | 1 |
| Kario Salem | Brad Stevens | The Youngster | 1 | 1 |
| Ted Hamilton | Larry Wilkens | Lieutenant Chivers | 1 | 1 |
| Tom Atkins | Koko Apelika | Major Lawrence Weems | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.