Derek Riddell (born 11 January 1967) is a Scottish television and theatre actor. He is best known for the portrayal of Richard Cawood in the BBC One television series Happy Valley. He is also known for Gentleman Jack, Industry and The Missing. He has guest-starred in Doctor Who, Ugly Betty, Silent Witness, Waterloo Road, and Shetland. Riddell was born in Glasgow, the son of teacher and former actress Hope Ross and former St Mirren and Berwick Rangers footballer Ian Riddell. He graduated from the University of Strathclyde with a degree in business, before training at the London Academy of Music and Dramatic Art, graduating in 1990. (오뜨랑에서 실시간으로 번역된 한글 프로필도 확인할 수 있어요) 2024년 The Christmas Quest에서 Victor Grimes 역을 맡았다. 2024년 National Theatre Live: Till The Stars Come Down에서 John 역을 맡았다. 2024년 Boarders에서 Bernard 역을 맡았다.