What happens
Robin, young companion of Batman, has been arrested and accused of being the monkey burglar, a thief who scales skyscrapers to rob wealthy apartments. Clark Kent is given 48 hours to find the real culprit. Superman and Batman set a trap at the Windsor Arms, but while they wait, Robin and Jimmy Olsen are seized from Jimmy's house by men working for a figure called Spider, and a patrolman is shot. Police then report that Robin has been caught in another robbery, leaving the heroes facing a trap. The episode is part four of the series, which aired on February 17, 1947.
Metropolis, including the Windsor Arms apartment building and Jimmy Olsen's house on a quiet street
Characters: Superman, Clark Kent, Batman, Robin, Jimmy Olsen, Inspector Henderson, Spider, Lieutenant Orion
Listen for: The police report of a new robbery at the Windsor Arms, and the description that identifies Robin as the monkey burglar
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.