The Code Breakers Brian Cox and Robin Ince are joined by comedian Katy Brand, as they transport the cage of infinite proportions to the home of modern day cryptography and codebreaking., GCHQ. They'll be discovering how far we've come from the days of the humble code book and the birth of machines like Enigma. and how the new digital era has turned us all into modern day code breakers and cryptographers, without us even realising it. Producer: Alexandra Feachem.