Patricia, a cryptanalyst, introduces Alan Turing to the Engima machine and explains how it works. Alan is tasked with breaking the Enigma machine so that the Allies could read the intercepted German messages during World War II.
Beakman explains the history of code. Cryptography is the foundation of codes. Beakman then makes a DIY skytale to create a secret code. The enigma machine helped with WW2 codes and then Beakman shows how to create a DIY Grille to decode messages.