"Space Seed" is an episode of the American science fiction television series Star Trek. It is the 22nd episode of the first season and was first broadcast by NBC on February 16, 1967. "Space Seed" was written by Gene L. Coon and Carey Wilber and directed by Marc Daniels. Set in the 23rd century, the series follows the adventures of Captain James T. Kirk and his crew aboard the Starfleet starship USS Enterprise. In this episode, the Enterprise crew encounter a sleeper ship holding genetically engineered superpeople from Earth's past. Their leader, Khan Noonien Singh, attempts to take control of Enterprise. The episode also guest stars Madlyn Rhue as Lt. Marla McGivers, who becomes romantically involved with Khan.