What happens
Clark Kent returns to the Daily Planet and tells editor Perry White that the sealed letter Superman left with Dr. Millicent has vanished from White's office. Kent, Jimmy Olsen and White retrace their steps, recalling that the letter was not opened before they hurried to the observatory. They learn the group rode in a cab, and Kent sets out to trace the driver through the cab company's records. The episode is part two of The Adventures of Superman, a radio series, and it is broadcast in 1946.
The Daily Planet newspaper office and the Red and White cab company in Metropolis
Characters: Clark Kent, Perry White, Jimmy Olsen, Superman, Dr. Millicent, Miss Backus
Listen for: Clark Kent's search through the cab company records to find the driver who took the group to the observatory
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.