It's 50 years since David Attenborough first joined BBC TV and since then he's brought the world's most amazing wildlife spectacles into our living rooms - from Zoo Quest to Life on Earth, The Blue Planet and his new series The Life of Mammals, currently showing on Wednesdays. Michael Palin provides a behind-the-scenes look at the incredible career of his friend, and reveals the lighter side to his personality. Producer Brian Leith
RT SHOP: see The Life of Mammals and Life on Air book offers, yesterday 9pm