The Secret War, a six part WW2 documentary made by the BBC in association with the Imperial War Museum, is due for release in September 2014 by Simply HE.

Originally broadcast in 1977, it was presented by William Woollard, with each episode looking at the various different ways that science and intelligence helped the Allies to win the war. Episode titles are as follows –

Episode 1 – The Battle of the Beams
Episode 2 – To See A Hundred Miles
Episode 3 – Terror Weapons
Episode 4 – If
Episode 5 – The Deadly Waves
Episode 6 – Still Secret

Topics covered include the breaking of the Enigma code, Hitler’s terror weapons (the V1 and V2) and the development of Radar. Interviewees include Hitler’s Minister of Armaments, Albert Speer.

A full DVD review can be found here.