Box 13 was a syndicated radio series about the escapades of newspaperman-turned-mystery novelist Dan Holliday, played by film star Alan Ladd. Created by Ladd's company, Mayfair Productions, Box 13 premiered in 1947. In New York City, it first aired December 31, 1947, on Mutual's New York flagship, WOR. To seek out new ideas for his fiction, Holliday ran a classified ad in the Star-Times newspaper where he formerly worked: Adventure wanted, will go anywhere, do anything -- write Box 13, Star-Times. The stories followed Holliday's adventures when he responded to the letters sent to him by such people as a psycho killer and various victims.