Human Body: Secrets of Your Life Revealed, Episode 3 of 3, Learn
directed by Penny Palmer, fl. 2008; presented by Chris van Tulleken, 1978-; produced by Penny Palmer, fl. 2008, British Broadcasting Corporation and Open University, in Human Body: Secrets of Your Life Revealed, Episode 3 of 3 (London, England: BBC Worldwide, 2017), 59 mins