The Secret Code Part4 The Sea Spy Strikes

Jensen's failure to obtain the advanced rubber synthesis formula from the Black Commando is jeopardizing the mission of a Nazi U-boat in US coastal waters. So he decides to allow Dan Barton make a deal with the Commando. Of course, since Barton IS the Commando, he intends to pass a phony formula to Jensen. What actually ends up happening is... (1942 - Columbia Pictures)