
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.

Midsomer Murders
TV • 1997

Doctor Who
TV • 2005

Death in Paradise
TV • 2011

Casualty
TV • 1986

Spooks
TV • 2002

Ugly Betty
TV • 2006

Shetland
TV • 2013

Industry
TV • 2020

Terminator: The Sarah Connor Chronicles
TV • 2008

Ripper Street
TV • 2012

Taggart
TV • 1983

Law & Order: UK
TV • 2009

Bodies
TV • 2023

Gentleman Jack
TV • 2019

Happy Valley
TV • 2014

M.I. High
TV • 2007

Crime
TV • 2021

W1A
TV • 2014