출연진
Jeffrey Hunter
Christopher Pike
레너드 니모이
Spock
Majel Barrett
Number One
Susan Oliver
Vina
Meg Wyllie
The Keeper
Peter Duryea
Lieutenant José Tyler
Laurel Goodwin
Yeoman J. M. Colt
Clegg Hoyt
Transporter Chief Pitcairn
Malachi Throne
The Keeper (voice)
Michael Dugan
The Kaylar
Georgia Schmidt
First Talosian
Robert C. Johnson
First Talosian (voice)
Serena Sande
Second Talosian
Jon Lormer
Dr. Theodore Haskins
Adam Roarke
C.P.O. Garrison
Leonard Mudie
Second Survivor
Anthony Jochim
Third Survivor
Edward Madden
Enterprise Geologist
Robert Phillips
Orion Space Officer
Joseph Mell
Earth Trader
Janos Prohaska
Anthropoid Ape / Humanoid Bird