Synopsis by Hal Erickson
Ray Henderson (Richard Shakelton), son of police inspector Bill Henderson (Roberty Shayne), has been using his tape recorder to "collect" weird sounds. Unfortunately, Ray is hoodwinked into selling a tape containing the sound of tumblers on a safe to gangster Muscles McGurk (Billy Nelson). When McGurk uses the recorded information to steal evidence against him in an upcoming investigation, Ray is implicated in the crime--and Henderson may be forced to arrest his own son. If there was ever a job for Superman (George Reeves), this is it!