Mysterious Doctor Satan
Directed by John English, William WitneyNot Rated
1940 4h 27m[Action](/on-demand/category/action), [Adventure](/on-demand/category/adventure)7.16.0
A mad scientist named Dr. Satan plots to steal key pieces of technolgy to enable him to build an army of robots based on his prototype to conquer America. The only one standing in his way is Bob Wayne, who fights Satan as the enigmatic Copperhead.
