The 17th episode of Gene Roddenberry’s science fiction series Star Trek airs on NBC. William Campbell guest stars. 
Stardate 2124.5: The Enterprise crew discovers that the ship cannot escape orbit of a planet that doesn’t even exist on the star charts. Kirk and a landing party beam down to the surface of the mysterious planet and their captor is revealed to be the immature but powerful Trelane, who initially seems to be a student of ancient Earth history (as demonstrated by his 17th century mansion, clothes and furnishings). Kirk, discovering that Trelane’s hold on the Enterprise comes from a power far beyond 23rd century technology, must try to beat Trelane at his own game, but Trelane rewrites the rules constantly to make sure he’s winning.
written by Paul Schneider
directed by Don McDougall
music by Alexander CourageCast: 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), William Campbell (Trelane), Richard Carlyle (Jaeger), Michael Barrier (DeSalle), Venita Wolf (Teresa)
Notes: Perhaps it’s because he doesn’t identify himself on that occasion, but a few members of the Enterprise crew who served under Captain Pike already encountered Trelaine – and at least one of his parents – in the Star Trek: Strange New Worlds episode Wedding Bell Blues.
LogBook entry by Earl Green