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