The 47th episode of Gene Roddenberry’s science fiction series Star Trek premieres on NBC. The Enterprise crew goes up against a psychedelic giant microbe (actually one of the most impressive effects of the original series). 
Stardate 4307.1: Spock telepathically receives the collective death cries of the entire all-Vulcan crew of the USS Intrepid, which has just been destroyed by an unknown force. The Enterprise intercepts a gigantic organism, which then surrounds the ship, beginning to cause physical and mental illness among the crew. Kirk, Spock and McCoy surmise that this paradoxically huge single-celled organism may be a “disease,” as its course will soon take it through inhabited star systems. The Enterprise may turn out to be the only “antibody” capable of saving millions from the onslaught of the enormous parasite.
written by Robert Sabaroff
directed by Joseph Pevney
music by Sol Kaplan and Fred SteinerCast: William Shatner (Captain James T. Kirk), Leonard Nimoy (Mr. Spock), DeForest Kelley (Dr. Leonard McCoy), James Doohan (Mr. Scott), George Takei (Lt. Sulu), Nichelle Nichols (Lt. Uhura), John Winston (Lt. Kyle), Majel Barrett (Christine Chapel)
LogBook entry by Earl Green