| Name | Character | Episodes |
|---|---|---|
| Burt Reynolds | Det. Lt. Dan August | 26 |
| Ned Romero | Sgt. Joe Rivera | 26 |
| Richard Anderson | Chief George Untermeyer | 26 |
| Ena Hartman | Katy Grant | 26 |
| Barney Phillips | Mike Golden | 3 |
| Bill Erwin | Coroner | 2 |
| John Lasell | Benjamin Wedlock | 2 |
| Harrison Ford | Hewett | 1 |
| Mickey Rooney | Kenny O'Malley | 1 |
| Mike Henry | Heap Canfield | 1 |
| Andy Romano | Lou Bowman | 1 |
| Linda Marsh | Eleanor Zachary | 1 |
| Robert Pine | Lt. Pete O'Connell | 1 |
| Diana Muldaur | 1 | |
| Carolyn Jones | Margo | 1 |
| Julie Adams | Patricia Fairley | 1 |
| John Ritter | Coley Smith | 1 |
| Ricardo Montalban | 1 | |
| Geoffrey Lewis | Jerry | 1 |
| Jan-Michael Vincent | Kevin Colter | 1 |
| Vic Morrow | Steve Harrison | 1 |
| Raymond St. Jacques | Jimmy Barlowe | 1 |
| Ellen Corby | Agnes Oaks | 1 |
| John Beck | Steve Phipps | 1 |
| Brooke Bundy | Joan Smith | 1 |
| Nehemiah Persoff | Leo Cussoni | 1 |
| Michael Warren | Mr. Gant | 1 |
| Richard Basehart | Prof. Theodore Rye | 1 |
| Fritz Weaver | Dr. Michael Serling | 1 |
| Dabney Coleman | Rick Bessett | 1 |
| H.M. Wynant | Lou Kramer | 1 |
| Barney Phillips | Dr. Golden | 1 |
| Gordon Pinsent | Frank Fairley | 1 |
| Jack Ging | Corporal Wade Pollock | 1 |
| Don 'Red' Barry | Ed Gurney | 1 |
| John Considine | Sylvester | 1 |
| Vera Miles | Carla | 1 |
| Andrew Prine | Terry Young | 1 |
| Rance Howard | Hobbs | 1 |
| Soon-Tek Oh | Au Chau | 1 |
| Joseph V. Perry | Leiber | 1 |
| Paul Bryar | Lou Fein | 1 |
| Jerry Douglas | Stan Palmer | 1 |
| Michael Tolan | John Eberson | 1 |
| David Soul | Lawrence Merrill III | 1 |
| Gerald S. O'Loughlin | Dominic Lazar | 1 |
| Peter Brown | Fred Bowers | 1 |
| Chris Robinson | Stan Manders | 1 |
| Charles Seel | Harry | 1 |
| Lynne Marta | Jody Forbes | 1 |
| Bill Quinn | Judge | 1 |
| Robert Lipton | Bud Fowler | 1 |
| Arch Johnson | Sergeant Forbes | 1 |
| Bartlett Robinson | Head of Military Academy | 1 |
| Ivan Bonar | Mr. Stedman | 1 |
| Peter White | Jeremy Jackson | 1 |
| Nick Benedict | 1 | |
| Lisabeth Hush | Jane Burnside | 1 |
| John Lasell | Ben Wedlock | 1 |
| Norman Alden | Benjamin Marsh | 1 |
| Janice Rule | Thelma Venable | 1 |
| Arthur Tovey | Pallbearer (uncredited) | 1 |
| Lou Antonio | Gordon Krager | 1 |
| Lillian Bronson | Amy Phipps | 1 |