What happens
Clark Kent, a newspaper reporter, arrives in Denver to investigate a mysterious plot against the West Coast railways after a rock slide nearly wrecks the Continental Limited. Mysterious warnings threaten that the silver clipper will never reach Salt Lake City. Kent meets with the division superintendent, who admits the railroad is frightened and unsure what to believe. Meanwhile, a figure known as the Wolf and his subordinate Kino plot in a hideout overlooking the rail yard, aware of Kent's reporting. The episode is part of The Adventures of Superman radio series, first broadcast on February 19, 1940.
Denver, Colorado, a railroad yard, a central station, and a hideout overlooking the rail yard
Characters: Clark Kent, The Wolf, Kino, Superintendent Campbell
Listen for: The telegram about a vanished engine and the Wolf's warning about the silver clipper
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.