
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.

Fantastic Beasts: The Crimes of Grindelwald
2018 · as Torquil Travers

Mary Shelley
2017 · as William Baxter

The Project
2002 · as Richard Loach

Micro Men
2009 · as Nigel Searle

The Christmas Miracle of Jonathan Toomey
2007 · as Parson

A Previous Engagement
2009 · as Hotel Desk Clerk

The Christmas Quest
2024 · as Victor Grimes

Bad Sugar
2012 · as Father Rodrigo

National Theatre Live: Till The Stars Come Down
2024 · as John

Much Ado About Nothing
2005 · as Don

Meat the Campbells
2005 · as Mr. Campbell

Tumshie McFadgen's Bid for Ultimate Bliss
2004 · as Tumshie McFadgen

Forgiven
2007 · as Stephen