Bletchley Park: Code-breaking's Forgotten Genius (2015)

(Himself - Narrator)

(Gordon Welchman (voice))

(Herself - Gordon Welchman's Daughter)

(Himself - Ex-Head of Hut 6, Bletchley Park (1939-1941) (archive footage))

(Himself - Author, 'The Secret Life of Bletchley Park')

(Himself - Veteran, Hut 6)

(Himself - Veteran, Hut 6)

(Herself - Veteran, Hut 6)

(Himself - GCHQ Historian and Former Analyst)

(Himself - Vice President, Wolfson College, Cambridge (as Prof John Naughton))

(Himself - Chairman, Bletchley Park Trust, and Former Chief, MI6 (as Sir John Scarlett KCMG OBE))

(Herself - Gordon Welchman's Granddaughter)

(Himself - Former President, The MITRE Corporation)

(Himself - Gordon Welchman's Colleague)

(Himself - Gordon Welchman's Colleague)