What happens
Superman and Batman track down Henry Baker, a pickpocket known as Eyebrows, after a glove with his fingerprints is found at Clark Kent's apartment. Superman fears that the police will find his secret letter revealing his identity on the suspect, which would expose Clark Kent as Superman. The two heroes follow Eyebrows to a hotel, where they plan to retrieve the letter without arousing suspicion. The episode continues with the threat to Superman's secret identity and a new danger to his friends, while Superman tries to protect the letter from falling into the wrong hands.
Metropolis, including the police crime detection laboratory and a hotel
Characters: Superman, Batman, Clark Kent, Sergeant O'Neill, Henry Baker, Inspector Henderson, Perry White
Listen for: The moment Superman and Batman locate the letter in the hotel 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.