1. Episode 1

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. 27 July 2015. 60 min

Penelope Keith uncovers the secrets behind some of the BBC's greatest artists and programmes as she delves into the corporation's written archives.

2. Episode 2

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. 14 April 2016. 60 min

Penelope Keith looks into the BBC's secret dealings with some of the 20th century's most intriguing figures, including Winston Churchill, Tony Hancock and Alec Guinness.