Derek Riddell

Derek Riddell 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.

Doctor Who · S2, E2

Tooth and Claw

The Doctor and Rose have to protect Queen Victoria, but can anything stop the Empire of the Wolf?
Ugly Betty · S2, E7

A Nice Day for a Posh Wedding

Wilhelmina realizes that her maid of honor (Victoria Beckham) is stealing her thunder as she prepares for her big day; guilt consumes Betty over her pact with Wilhelmina.
Ugly Betty · S2, E11

Zero Worship

As Mode prepares for its annual 10 Designers to Watch fashion show, Betty is deeply struck with the effect the magazine has on young girls when Justin's class visits Mode on a field trip.
Ugly Betty · S3, E2

Filing for the Enemy

Wilhelmina tries to convince Betty to take a job as her assistant; Daniel has to engage in a custody battle to keep his son in the U.S.
Ugly Betty · S3, E3

Crimes of Fashion

Betty, Marc and Amanda try to track down the real culprit in Christina's attempted murder; Wilhelmina learns to respect and care for Christina.
Ugly Betty · S2, E16

Betty's Baby Bump

Betty throws Charlie the mother of all baby showers; Christina learns who the father of the child she is carrying for Wilhelmina.