On screen
Cast
18 credited performers
Robert Foxworth
Questor
Mike Farrell
Jerry Robinson
John Vernon
Geoffrey Darro
Lew Ayres
Vaslovik
James Shigeta
Dr. Chen
Robert Douglas
Dr. Michaels
Dana Wynter
Lady Helena Trimble
Ellen Weston
Allison Sample
Majel Barrett
Dr. Bradley
Artwork unavailable
Reuben Singer
Dr. Gorlov
Walter Koenig
Administrative Assistant
Fred Sadoff
Dr. Audret
Artwork unavailable
Gerald Peters
Randolph
Artwork unavailable
Eyde Girard
Stewardess
Alan Caillou
Immigration Offical
Artwork unavailable
Lal Baum
Col. Hendricks
Artwork unavailable
Patti Cubbison
Secretary
Ian Abercrombie
Charlie