| Name | Character | Episodes |
|---|---|---|
| Edward Herrmann | President | 2 |
| Stephen Root | Mark Hastings | 2 |
| Jane Leeves | Rachel Sherwood | 2 |
| Kurt Fuller | Chet Walters | 2 |
| Richard Dean Anderson | James Holland | 2 |
| Daphne Zuniga | Roni Sanders | 2 |
| William Salyers | Controller | 2 |
| Robert Loggia | Jonathan Roth | 2 |
| Vladimir Kulich | Yuri | 2 |
| Robert Guillaume | Ambassador Lee Lancaster | 2 |
| Richard Lawson | Daniel Robb | 2 |
| John Considine | Dr. Turnheir | 2 |
| Dennis Bateman | Dutch Controller | 2 |
| Kate Hodge | Brenda Hopkins | 2 |
| Grant Goodeve | Don Moses | 2 |
| Michael David Simms | Nasher | 2 |
| Jennifer Savidge | Barb Rollins | 2 |
| Jerry Hardin | Garson Wilson | 2 |
| Penny Peyser | Lisa Erickson | 2 |
| Michael Winters | Ernest Helms | 2 |
| Byrne Piven | 2 | |
| Scott Bryce | Keith Erickson | 2 |
| Jane Jones | Press Secretary | 2 |
| Wolf Muser | Dr. Zeitner | 2 |
| Dmitri S. Boudrine | Nikolai Sakarov | 2 |
| Elaine Miles | Housekeeper | 2 |
| Sean Everett | ICN Director | 2 |
| Tim Grimm | Steve Ellis | 2 |