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 Walter Koenig Ensign Pavel Chekov Actor Warren Stevens Rojan Guest Star Barbara Bouchet Kelinda Guest Star Stewart Moss Hanar Guest Star Majel Roddenberry Nurse Christine Chapel Guest Star Robert Fortier Tomar Guest Star Lezlie Dalton Drea Guest Star Carl Byrd Lt. Shea Guest Star Julie Cobb Yeoman Guest Star Eddie Paskey Leslie Guest Star Bill Blackburn Hadley Guest Star Gene Roddenberry Executive Producer Jerome Bixby Writer D.C. Fontana Writer Marc Daniels Director