The Masked Marvel T-Shirt celebrates one of Republic Pictures best loved serials. Originally broadcast in 12 chapters in 1943, The Masked Marvel is a reverse of the "old mystery villain theme." The identity of the Masked Marvel is kept secret from the audience until the last chapter. Clues and red herrings about the hero's identity are unveiled throughout the serial.
Stuntman Tom Steele played the part of The Masked Marvel in the whole series except for the final 'reveal' scene and was not included in the final credits.