William Shatner Capt. James T. Kirk Actor Leonard Nimoy Mr. Spock Actor DeForest Kelley Dr. Leonard McCoy Actor James Doohan Engineer Montgomery Scott Actor Nichelle Nichols Lt. Uhura Actor George Takei Lt. Sulu Actor David Opatoshu Anan 7 Guest Star Gene Lyons Ambassador Fox Guest Star Robert Sampson Sar 6 Guest Star Barbara Babcock Mea 3 Guest Star David L. Ross Galloway Guest Star Miko Mayama Tamura Guest Star Eddie Paskey Leslie Guest Star Sean Kenney DePaul Guest Star Frank da Vinci Brent, Eminian Guard 4 Guest Star Bill Blackburn Hadley Guest Star John Burnside Eminian Guard 5 Guest Star Majel Roddenberry Computer Guest Voice Gene Roddenberry Executive Producer Gene L. Coon Writer Robert Hamner Writer Joseph Pevney Director