The 46th episode of Gene Roddenberry’s science fiction series Star Trek premieres on NBC. Kirk and Spock gang up on a society who has taken a piece of outdated Earth literature and turned it into a blueprint for a blood-soaked society. (As heavy as that sounds, much hilarity ensues.) Vic Tayback (Alice) guest stars. 
Stardate 4598.0: The Enterprise encounters a planet recently visited by another starship and discovers that a book on the Chicago mobs of the 1920s accidentally left behind by a crew member of the previous ship has become the basis of the planet’s society structure over 200 years of the planet’s time (the starship having had warp drive). The intelligent but imitative inhabitants show a keen interest in replacing telephones with communicators and replacing tommy guns with phasers when Kirk, Spock and McCoy – along with their standard Starfleet landing party equipment – are captured.
teleplay by David P. Harmon and Gene L. Coon
story by David P. Harmon
music not creditedCast: 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), Anthony Caruso (Bela), Victor Tayback (Krako), Lee Delano (Kalo), John Harmon (Tepo), Sheldon Collins (Tough Kid), Dyanne Thorne (First Girl), Sharyn Hillyer (Second Girl), Buddy Garion (Hood), Steve Marlo (Zabo)
LogBook entry by Earl Green