The Secret Code (serial)

The Secret Code 1942 was the 19th serial released by Columbia Pictures. It features the masked hero The Black Commando facing Nazi saboteurs, inspired by Republic Pictures successful Spy Smasher serial of the same year. The chapters of this serial each ended with a brief tutorial in cryptography.

As an aggregate value, at the end of each episode, the audience is given a short lecture on solving complex secret messages.The hero, The Black Commando, was patterned after Spy Smasher. Republics Spy Smasher serial had been released several months before The Secret Code in 1942. Columbias adverts for The Secret Code included the phrases Smash spies with the Secret Service and Thrill again to spy smashers biggest chase ........

Source: Wikipedia