Sir Michael Parkinson looks back over his 50 years as a broadcaster, revealing some tricks of the interview trade and remembering some of his favourite encounters.

The Ascent of Man is a thirteen-part documentary television series produced by the BBC and Time-Life Films first transmitted in 1973, written and presented by Jacob Bronowski. Intended as a series of "personal view" documentaries in the manner of Kenneth Clark's 1969 series Civilisation, the series received acclaim for Bronowski's highly informed but eloquently simple analysis, his long unscripted monologues and its extensive location shoots.