| Name | Character | Episodes |
|---|---|---|
| Jerry Paris | Tim Rourke | 32 |
| Herbert Rudley | Police Lt. Gentry | 32 |
| Richard Denning | Michael Shayne | 32 |
| Richard Crane | 1 | |
| Michael Forest | 1 | |
| Susan Oliver | 1 | |
| James Best | 1 | |
| Pat Crowley | 1 | |
| Celia Lovsky | 1 | |
| Lynn Bari | 1 | |
| Jack Ging | Fred Palmer | 1 |
| Yvonne Craig | Nan Palmer | 1 |
| Frank Albertson | 1 | |
| Nancy Rennick | Connie Pico | 1 |