Mysterious Doctor Satan 1940

Synopsis:

A mad scientist named Dr. Satan plots to steal key pieces of technology 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. Mysterious Doctor Satan is a 1940 film serial named after its chief villain. Doctor Satan's main opponent is the masked mystery man, "The Copperhead", whose secret identity is Bob Wayne, a man searching for justice and revenge on Satan for the death of his step-father. The serial charts the conflict between the two as Bob Wayne pursues Doctor Satan, while the latter completes his plans for world domination.

Directed by: John English & William Witney
Written by: Franklin Adreon & Joseph F. Poland & Ronald Davidson & Sol Shor & Norman S. Hall
Runtime: 267 minutes
Tagline: CRAZED WITH THE LUST TO KILL! A power-mad maniac unleashes a lightning attack on an unsuspecting nation...And finds the Copperhaed thirsting for revenge!
Cast:
Eduardo Ciannelli
Eduardo Ciannelli
Doctor Satan 
Robert Wilcox
Robert Wilcox
Bob Wayne / Copperhead 
William Newell
William Newell
Speed Martin 
C. Montague Shaw
C. Montague Shaw
Prof. Thomas Scott 
Ella Neal
Ella Neal
Lois Scott 
Dorothy Herbert
Dorothy Herbert
Alice Brent