1929: Two women meet at Bletchley Park but the real secrets are the ones they bring with them…
1940/1947: The women of Bletchley Park have their own share of secrets
1930s – 1940s: The woman behind the great man Alan Turing – his mother.
1940s, 1962: Letters are sent to various people revealing secrets of the past
1930s – 1940s: Alan Turing’s nephew, Dermot Turing, takes a fresh look at the influences on Alan Turing’s life