| Name | Character | Episodes |
|---|---|---|
| Reni Santoni | Lt. Rivera | 8 |
| Simon MacCorkindale | Jonathan Chase | 8 |
| William Conrad | Narrator (uncredited) | 8 |
| Melody Anderson | Brooke McKenzie | 8 |
| Michael D. Roberts | Tyrone C. Earl | 8 |
| Don Knight | Chase's Father (uncredited) | 2 |
| Wolf Roth | 2 | |
| Lew Horn | 2 | |
| James Hong | Grandfather Tan | 1 |
| George Cheung | 1 | |
| Robert Englund | 1 | |
| Ursula Andress | 1 | |
| Doug McClure | 1 | |
| Mary-Margaret Humes | 1 | |
| Richard Lynch | 1 | |
| Anne Ramsey | 1 | |
| Gloria Stuart | 1 | |
| Lloyd Bochner | Jordon | 1 |
| Ed Lauter | Col. Hunt | 1 |
| David Sheiner | 1 | |
| Keenan Wynn | 1 | |
| Lloyd Kino | Mr. Chang | 1 |
| Tracy Scoggins | 1 | |
| Terry Kiser | 1 | |
| Fran Ryan | 1 | |
| Robert Tessier | 1 | |
| Glenn Corbett | 1 | |
| Rick Jason | Prof. Barta | 1 |
| Jeff Corey | 1 | |
| Albert Paulsen | 1 | |
| Shashawnee Hall | 1 | |
| Michael McGuire | Stanford Langly | 1 |
| William Bumiller | 1 | |
| Meeno Peluce | 1 | |
| Peter Brown | 1 | |
| Christopher Stone | 1 | |
| Jonathan Goldsmith | 1 | |
| Robert O'Reilly | 1 | |
| Michael Gregory | 1 | |
| Fred Sadoff | 1 | |
| Avner Garbi | Sheik | 1 |
| John Mahon | Man | 1 |
| Grainger Hines | 1 |