| Name | Character | Episodes |
|---|---|---|
| Lorne Greene | 13 | |
| Sal Mineo | President Gamal Zaki | 13 |
| Vic Tayback | 13 | |
| Ben Murphy | 13 | |
| Ricardo Montalban | 1 | |
| Brooke Bundy | 1 | |
| Pamela Hensley | June | 1 |
| Lee Montgomery | 1 | |
| Scatman Crothers | Joe Rawls | 1 |
| Joseph V. Perry | Parker | 1 |
| Robert Donner | Roscoe Horvath | 1 |
| Steven Keats | Larry Taylor | 1 |
| John Sylvester White | 1 | |
| Inga Swenson | Katherine McAfee | 1 |