What happens
Superman's secret letter, which reveals that Clark Kent is his alter ego, has gone missing. Clark Kent, Jimmy Olsen and a taxi driver named Mack trace the letter's path through the taxi ride back from the observatory. Meanwhile, Buster and his companion, Eyebrows, have read the letter and are weighing whether to use it for profit. Clark Kent's search leads the group to the Metropolis Hotel, where the two men were staying. The episode ends with the group just missing them there, so the letter's whereabouts remain unresolved.
Metropolis, including the Metropolis Hotel, a Red and White Taxi Company office, and the city streets
Characters: Clark Kent, Jimmy Olsen, Mack McCloskey, Buster, Eyebrows, Perry White, Dr. Miller, Professor Fiddleheimer
Listen for: The taxi log entries, Mack's description of the passenger with bushy eyebrows, and the hotel lobby scene where Clark Kent arrives just after Eyebrows and Buster leave
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.