A truly magnificent documentary about two unsung computer pioneers, the men who secretly built Colossus MK1/MK2 one of the earliest electronic programmable computers in history and then had to keep it secret under British intelligence. This is a fitting tribute to Tommy Flowers and Bill Tutte who should be honoured for their contribution to computing.
Features interviews by family of both men and a exclusive interview with Captain Jerry Roberts a senior officer in Bletchley Park.
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