Matthew Bannister on

Bernard Cribbins OBE, the much-loved actor known for appearances in The Railway Children and Doctor Who as well as reading countless stories on Jackanory.

Diana Kennedy MBE, the British-born food writer who dedicated her life to promoting the diversity of Mexican cuisine.

Sir Colin Blakemore, the neuroscientist who received death threats after speaking out in defence of experiments on animals.

Nichelle Nichols, the trailblazing African American actor who played Lieutenant Uhura in Star Trek.

Producer: Sofie Vilcins

Interviewed guest: Jenny Agutter Interviewed guest: Helen Lederer Interviewed guest: Gabriela Cámara Interviewed guest: Fiona Fox

Archive clips used: EMI Films, The Railway Children 1970; BBC One, Fawlty Towers - The Hotel Inspectors 10/10/1975; BBC, CBeebies - Storm in a Teacup 05/04/2015; Filmfair, The Wombles - One Pair of Feet 23/02/1973; BBC Radio 4, The Food Programme 30/06/2014; Greenwich Entertainment/Submarine Deluxe, Diana Kennedy - Nothing Fancy 2020; BBC Two, The Mind Machine 13/09/1988; BBC Radio 4, Today 08/11/2011; BBC Radio 4, The Life Scientific - Sir Colin Blakemore 08/11/2011; Desilu Productions/Norway Corporation, Star Trek S02E02 Who Mourns For Adonais 27/04/1970; BBC Radio 4, Archive on 4 - Star Trek, The Undiscovered Future 03/09/2016; BBC Radio 1, Nicky Campbell - Nichelle Nichols interview 31/01/1995; NASA, Recruitment Film 1977; Yap Films, Building Star Trek (TV Movie) 2016.