After slipping Bruce Wayne a Mickey, Herbert Calkins has free rein to search behind the secret panel in Clark Kent’s bedroom for incontrovertible evidence that he’s Superman! But Superman has other ideas. Will he return in time to stop Calkins? Beating the clock never had such high stakes! Plus, in today’s Important Message, the Swell Prizes Program is about to kick off again, but don’t worry! The Bat-Supers Club isn’t going anywhere!

Part 8 of “The Super Sleuth” was originally broadcast on July 30, 1946!