 |
Robert Foxworth as Questor |
 |
Mike Farrell as Jerry Robinson |
 |
John Vernon as Geoffrey Darro |
 |
Lew Ayres as Vaslovik |
 |
James Shigeta as Dr. Chen |
 |
Robert Douglas as Dr. Michaels |
 |
Dana Wynter as Lady Helena Trimble |
 |
Ellen Weston as Allison Sample |
 |
Majel Barrett as Dr. Bradley |
 |
Reuben Singer as Dr. Gorlov |
 |
Walter Koenig as Administrative Assistant |
 |
Fred Sadoff as Dr. Audret |
|
Gerald Peters as Randolph |
|
Eyde Girard as Stewardess |
|
Alan Caillou as Immigration Offical |
|
Lal Baum as Col. Hendricks |
|
Patti Cubbison as Secretary |
 |
Ian Abercrombie as Charlie |
| Directing | Richard A. Colla | Director |
| Editing | J. Terry Williams | Editor |
| Writing | Gene Roddenberry | Teleplay |
| Crew | Michael D. Margulies | Cinematography |
| Sound | Gil Mellé | Original Music Composer |
| Production | Howie Horwitz | Producer |
| Writing | Gene Roddenberry | Story |
| Writing | Gene L. Coon | Teleplay |
| Editing | Robert L. Kimble | Editor |
