Judith Anderson
as High Priestess T'Lar
John Larroquette
as Maltz
Miguel Ferrer
as First Officer
DeForest Kelley
as Commander Leonard H. McCoy, M.D.
James Doohan
as Commander/Captain Montgomery Scott
Walter Koenig
as Commander Pavel Andreievich Chekov
Nichelle Nichols
Merritt Butrick
as Dr. David Marcus
Mark Lenard
as Ambassador Sarek
Robin Curtis
as Lieutenant Saavik
James Sikking
as Capt. Styles
Robert Hooks
as Admiral Morrow