
| Howard Duff | ... | Det. Sgt. Sam Stone (73 episodes, 1966-1969) |

| Ben Alexander | ... | Desk Sgt. Dan Briggs (73 episodes, 1966-1969) |

| Dennis Cole | ... | Det. Jim Briggs (73 episodes, 1966-1969) |
 | Vince Howard | ... | Motorcycle Cop / ... (10 episodes, 1966-1968) |
 | Ross Elliott | ... | William Torrence / ... (6 episodes, 1967-1968) |
 | Gail Kobe | ... | Dorothy / ... (5 episodes, 1966-1969) |
 | Len Wayland | ... | D.A. Adam Fisher (5 episodes, 1966-1967) |
 | Thom Carney | ... | Thurston / ... (5 episodes, 1967-1968) |
 | Jason Wingreen | ... | Art Rice / ... (4 episodes, 1966-1968) |

| Richard Anderson | ... | Gwinn / ... (4 episodes, 1966-1969) |

| Richard Bull | ... | Arthur Lacey / ... (4 episodes, 1966-1969) |
 | John S. Ragin | ... | Dr. Kern / ... (4 episodes, 1966-1968) |
 | Dick Dial | ... | Det Boyd / ... (4 episodes, 1967-1969) |
 | Jack Denbo | ... | Arnold Case / ... (4 episodes, 1967-1968) |

| Natalie Trundy | ... | Betty Barnes / ... (4 episodes, 1967) |

| Sam Elliott | ... | Attendant / ... (3 episodes, 1968-1969) |

| Lynda Day George | ... | Julie Brown / ... (3 episodes, 1966-1968) |
 | Paul Kent | ... | Doctor / ... (3 episodes, 1966-1968) |
 | Larry D. Mann | ... | Ham / ... (3 episodes, 1966-1968) |
 | Michael Conrad | ... | Zachary / ... (3 episodes, 1966-1967) |

| Lawrence Dane | ... | Garth / ... (3 episodes, 1967-1969) |
 | Morgan Sterne | ... | Keefer / ... (3 episodes, 1967-1969) |
 | John Armond | ... | Jimmy Hines / ... (3 episodes, 1967-1968) |
 | Paul Napier | ... | 1st Reporter / ... (3 episodes, 1967-1968) |

| Marion Ross | ... | Nurse / ... (3 episodes, 1967-1968) |
 | John Clarke | ... | Dr. Sidney Kane / ... (3 episodes, 1967) |
 | Jack Garner | ... | Dispatcher / ... (3 episodes, 1967) |
 | Henry Hunter | ... | Eric Madden / ... (3 episodes, 1967) |
 | Anna Strasberg | ... | Anna / ... (3 episodes, 1967) |
 | Harry Townes | ... | Bruce Brownell / ... (3 episodes, 1967) |
 | Edward Crawford | ... | Josh Sims / ... (3 episodes, 1968-1969) |
 | Joseph Mell | ... | Lou / ... (2 episodes, 1966-1967) |
 | Sidney Clute | ... | Cab Driver / ... (2 episodes, 1967-1968) |
 | Robert Doyle | ... | Dixie Ralt / ... (2 episodes, 1966-1969) |
 | Charles Aidman | ... | Army Sgt Sanford 'Sandy' Lufton / ... (2 episodes, 1966-1968) |

| James Best | ... | Arnold Wyatt / ... (2 episodes, 1966-1968) |
 | John Larch | ... | Bill Ehlers / ... (2 episodes, 1966-1968) |

| Kevin McCarthy | ... | Charles Roland Flagg / ... (2 episodes, 1966-1968) |
 | Rhoda Williams | ... | Miss Baker / ... (2 episodes, 1966-1968) |

| Paul Carr | ... | Joe Lennox / ... (2 episodes, 1966-1967) |
 | Francisco Charles | ... | Mike Pyle / ... (2 episodes, 1966-1967) |

| Robert Drivas | ... | Joey Cahill / ... (2 episodes, 1966-1967) |
 | Lew Gallo | ... | Covert / ... (2 episodes, 1966-1967) |
 | Lloyd Haynes | ... | 1st Officer / ... (2 episodes, 1966-1967) |
 | Clint Ritchie | ... | Eddie / ... (2 episodes, 1966-1967) |
 | Michael Stanwood | ... | Airline Clerk / ... (2 episodes, 1966-1967) |
 | Wayne Sutherlin | ... | Messenger / ... (2 episodes, 1966-1967) |
 | Don Gazzaniga | ... | Al / ... (2 episodes, 1966) |

| Alan Oppenheimer | ... | Ed Clark (2 episodes, 1966) |
 | Dyanne Thorne | ... | Diana Porter / ... (2 episodes, 1966) |
 | Layne Britton | ... | Charlie Barnes / ... (2 episodes, 1967-1969) |
 | Mimi Dillard | ... | Miss Williams / ... (2 episodes, 1967-1969) |
 | Jason Evers | ... | Eliot Rogers / ... (2 episodes, 1967-1968) |

| Ricardo Montalban | ... | Martin Lynch / ... (2 episodes, 1967-1968) |

| Woodrow Parfrey | ... | Eddie Rade / ... (2 episodes, 1967-1968) |

| Vic Tayback | ... | Dutch / ... (2 episodes, 1967-1968) |
 | Nicky Blair | ... | Desk Guard (2 episodes, 1967) |
 | Makee K. Blaisdell | ... | Paco (2 episodes, 1967) |
 | Hank Brandt | ... | Earl (2 episodes, 1967) |
 | John J. Burns | ... | Bodyguard (2 episodes, 1967) |
 | James Daly | ... | Adam Langley (2 episodes, 1967) |
 | John Harmon | ... | Loomis (2 episodes, 1967) |
 | Lawrence Montaigne | ... | George Carson (2 episodes, 1967) |
 | Jorge Moreno | ... | Mexican Police Chief (2 episodes, 1967) |
 | Terry Naylor | ... | Airline Info Girl / ... (2 episodes, 1967) |

| Stuart Nisbet | ... | Porter / ... (2 episodes, 1967) |
 | David Opatoshu | ... | Carl Luther (2 episodes, 1967) |
 | Bill Quinn | ... | Burke (2 episodes, 1967) |

| Karen Steele | ... | Nina Barnes (2 episodes, 1967) |

| Harold J. Stone | ... | Joe Stengl (2 episodes, 1967) |

| Robert DoQui | ... | Det. Cliff Sims (2 episodes, 1968-1969) |
 | Hal Frederick | ... | Ray Hendrix (2 episodes, 1968-1969) |

| Paul Picerni | ... | Mark Hewitt / ... (2 episodes, 1968-1969) |
 | Gloria Calomee | ... | Doreen Sims (2 episodes, 1968) |
 | Michael Christian | ... | Perke (2 episodes, 1968) |
 | Rupert Crosse | ... | Ray Hawkins (2 episodes, 1968) |
 | Lara Lindsay | ... | Angela LeMay / ... (2 episodes, 1968) |

| Cleavon Little | ... | Jesse Hawkins (2 episodes, 1968) |

| Roddy McDowall | ... | Ollie Olds (2 episodes, 1968) |
 | Jon Shank | ... | Bolo (2 episodes, 1968) |
 | Eric Sinclair | ... | Lyn Amboy / ... (2 episodes, 1968) |
 | Julie Sommars | ... | Ellen Willis / ... (2 episodes, 1968) |
 | Zolya Talma | ... | Mary Kantos (2 episodes, 1968) |
 | Amy Thomson | ... | Bobo Bradshaw / ... (2 episodes, 1968) |
 | Arnold Williams | ... | K.C. (2 episodes, 1968) |
 | Venita Wolf | ... | Secretary (2 episodes, 1968) |

| Marj Dusay | | (2 episodes, 1969) |

| Fritz Weaver | ... | Bender (2 episodes, 1969) |
 | Frank Maxwell | ... | Captain Nye (1 episode, 1967) |
|
 | Barney Phillips | ... | Capt. Franks (unknown episodes, 1967-1968) |