Detective Brock
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.
Corporal Bob Hastings
O canadense Tom Merritt descobriu uma substância que curará a paralisia infantil, que ele extrai de uma mina em Caribou, no Canadá. Um país em guerra com o Canadá descobre que a substância também contém propriedades magnéticas que tornarão suas minas efetivas contra a frota britânica e enviar um dos seus oficiais de inteligência para trabalhar disfarçado para garantir um fluxo constante da substância para a Pátria.
Agent Bruce
A mad doctor named Zanoff uses a drug to bring himself back from the dead after his execution in prison. Dick Tracy sets out to capture Zanoff before he can put his criminal gang back together again.
The younger brother of an officer in a secret government code-breaking unit gets involved with a gang of spies and a beautiful double agent.
