| Name | Character | Episodes |
|---|---|---|
| Jack Warden | D. P. C. Matthew Gower | 14 |
| William Smith | Sgt. Danny Keller | 14 |
| Arch Johnson | Capt. Gus Honochek | 14 |
| George Kennedy | 2 | |
| Milton Selzer | 2 | |
| Morgan Woodward | 1 | |
| John Astin | 1 | |
| John Ireland | 1 | |
| Adam Williams | 1 | |
| Beverly Garland | 1 | |
| Everett Sloane | 1 | |
| Norma Crane | 1 | |
| Robert Vaughn | 1 | |
| Michael Parks | 1 | |
| Fritz Weaver | 1 | |
| Paul Carr | 1 | |
| Paul Stewart | 1 | |
| Emile Meyer | 1 | |
| Frank Maxwell | 1 | |
| Steve Brodie | 1 | |
| Alexander Scourby | Roy Bradley | 1 |
| William Keene | 1 | |
| John Harmon | 1 | |
| Val Avery | 1 | |
| Malcolm Atterbury | 1 | |
| Vera Miles | 1 | |
| Philip Carey | 1 | |
| Elizabeth MacRae | 1 | |
| Robert Douglas | 1 | |
| Edward Binns | 1 | |
| Abraham Sofaer | 1 | |
| Linda Watkins | 1 | |
| Frank Ferguson | 1 | |
| Joe Turkel | 1 | |
| Leo Penn | 1 | |
| Skip Homeier | 1 | |
| Frank Overton | 1 | |
| Robert H. Harris | 1 | |
| Gerald S. O'Loughlin | 1 | |
| Virginia Christine | 1 | |
| James Westerfield | 1 | |
| Joyce Meadows | 1 | |
| Arthur Batanides | 1 | |
| Iphigenie Castiglioni | 1 | |
| Leora Dana | 1 | |
| Brad Morrow | 1 |