REGULAR CAST:

William Shatner as Captain James T. Kirk
Leonard Nimoy as Spock
DeForest Kelley as Dr. Leonard H. McCoy
James Doohan as Chief Engineer Montgomery 'Scotty' Scott
George Takei as Lieutenant Hikaru Sulu
Nichelle Nichols as Lieutenant Uhura
Majel Barrett as Nurse Christine Chapel

GUEST CAST:

Morgan Farley as Hacom
Brioni Farrell as Tula
Sid Haig as First Lawgiver
Karl Held as Lindstrom (as Christopher Held)
Jon Lormer as Tamar
Charles Macaulay as Landru
Lev Mailer as Bilar (as Ralph Maurer)
Miko Mayama as Yeoman Tamura
Sean Morgan as Lt. O'Neil
Eddie Paskey as Lt. Leslie (uncredited)
David L. Ross as Lt. Galloway
Torin Thatcher as Marplon
Harry Townes as Reger

PRODUCTION:

Teleplay by: Boris Sobelman
Story by: Gene Roddenberry
Directed by: Joseph Pevney