| Name | Character | Episodes |
|---|---|---|
| Barry Sullivan | 39 | |
| James Hong | 2 | |
| Lynn Cartwright | 2 | |
| Albert Carrier | 2 | |
| Mario Gallo | 1 | |
| George Davis | 1 | |
| Bing Russell | 1 | |
| Michael Fox | 1 | |
| John Banner | 1 | |
| Richard Bull | 1 | |
| Bill Erwin | 1 | |
| Rand Brooks | 1 | |
| Rolfe Sedan | 1 | |
| Richard Loo | 1 | |
| Bud Osborne | 1 | |
| Dennis Moore | 1 | |
| Patricia Donahue | 1 | |
| Leonard Nimoy | 1 | |
| George J. Lewis | 1 | |
| Lilyan Chauvin | 1 | |
| Jan Shepard | 1 | |
| Lois Hall | 1 | |
| Julian Rivero | 1 | |
| Norbert Schiller | 1 | |
| Terry Frost | 1 | |
| Dick Wilson | 1 | |
| Frank Fenton | 1 | |
| Arthur Batanides | 1 | |
| Beulah Quo | 1 | |
| John Bennes | 1 | |
| Henry Rowland | 1 | |
| Patrick Whyte | 1 | |
| Kort Falkenberg | 1 | |
| Anna Navarro | 1 | |
| Barboura Morris | 1 | |
| Abel Franco | 1 | |
| Rick Vallin | 1 | |
| Charles Maxwell | 1 | |
| Emil Sitka | 1 | |
| Julia Montoya | 1 | |
| Henry Corden | 1 | |
| Larry Thor | 1 |