THE MASKED MARVEL starring Martin Crane
Made during the dark days of W.W.II, this fast moving espionage thriller is a first rate example of the serial format at it's best. A superhero called The Masked Marvel battles Japanese saboteurs intent on blowing up America. In a reversal of the common serial plot, the audience doesn't know who the hero is until the final reel.
The late Tom Steele was one of those great stuntmen who made action actors look good, but doesn't even get screen credit. Steele also doubles as a couple of the investigators in their unmasked action scenes and, on top of that, appears as TWO of the bad guys.