Old Time Radio, The Adventures of Superman: The Yellow Mask and the 5 Million Dollar Jewel Robbery

"The Yellow Mask and the 5 Million Dollar Jewel Robbery"
Aired: October - November 1940, 15 parts

On the train back to Metropolis, Clark and Jimmy witness the handoff of a valuable collection of jewels, stolen by the Yellow Mask. Clark, Jimmy, Lois and Commissioner Malone are captured by the Yellow Mask, and locked in a concrete tank.

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