Having just missed crossing paths with Eyebrows and Buster, the two Metropolis Thugs who found the letter revealing his secret identity, Clark Kent, along with Jimmy Olsen and Mack the cab driver, search the Metropolis Hotel for clues. Meanwhile, Eyebrows and Buster are searching for clues of their own that will prove whether or not the letter is genuine. Plus, in today’s Important Message, we’ll take another look inside the new Bat-Supers Club Membership Kit!

Part 4 of “The Secret Letter” was originally broadcast on November 28, 1946!