Investigating a sector of space where starships have disappeared every 27 years, the U.S.S. Enterprise is drawn to the planet Taurus II, where they find a race of beautiful women living on the planet.

William Shatner (Captain James T. Kirk)
Leonard Nimoy (Commander Spock)
DeForest Kelley (Dr. Leonard H. McCoy)

George Takei (Lt. Hikaru Sulu)
Nichelle Nichols (Lt. Uhura)
Majel Barrett (Nurse Christine Chapel)
James Doohan (Lt. Cmdr. Montgomery Scott)

• Only the men on the ship are affected by the Taurean signal. The men are drawn to the planet where the women drain their life-forces to sustain themselves.
  
• When Scott falls under the signal's spell, Uhura assumes command of Enterprise as the senior officer. She then leads an rescue team consisting of female officers.
  
• In addition to Nurse Chapel, Majel Barrett also voices the Taurean leader Theela.
  
• Nichelle Nichols also voices Dara and security officer Davison. (Davison is not shown, but may have been one of the rescue team members.)
  
• James Doohan also voices Ensign Carver.