What happens
On Mars, Buzz Corey and Happy search an underground storage room of old books for Carol Carlisle, daughter of the Secretary-General of the United Planets. Earlier, on Venus, Zyla and Earl Kermody plotted to steal secret weapon plans from Space Patrol Captain Halcroft by posing as Carol. Commander Corey and Happy pursue the pair across Venus and then to Lowell City on Mars, where the plans are sold through a bookshop run by Uriah Scablin. The episode, in the Space Patrol series, first aired on January 23, 1954.
Venus City, the Venus City Space Hotel and spaceport, and Lowell City on Mars
Characters: Buzz Corey, Happy, Carol Carlisle, Captain Halcroft, Zyla Kermody, Earl Kermody, Uriah Scablin
Listen for: The Venus City hotel scene where Zyla poses as Carol Carlisle to get into Captain Halcroft's room
Written from the episode itself; it never gives away the ending. Every recording is remastered for the stream: cleaned of rumble, hiss and mains hum (and the old TV whine where we found it), then levelled in two passes to steady broadcast loudness, so one show is never quieter than the next.