Caroline Catz (born 19 October 1969) is an English film, television, theatre and radio actress, best known for her role as Louisa Glasson in Doc Martin since 2004. Her other roles have included Detective Inspector Kate Ashurst in Murder in Suburbia, Detective Inspector Helen Morton in DCI Banks, and PC Cheryl Hutchins in The Vice.

Filmography

• 2025The Extraordinary Miss Flower — Miss Flower
• A Small Light — Auguste Van Pels
• The Canterville Ghost — Lucy Otis
• 2020Delia Derbyshire: The Myths And Legendary Tapes — Delia Derbyshire, Director, Writer
• McDonald & Dodds — Alison Spiers
• 2020Suzy Lamplugh: The Unsolved Mystery — Narrator
• 2020The Queen and the Coup — Narrator
• 2018Delia Derbyshire: The Myths and Legendary Tapes — Delia Derbyshire, Producer, Director, Writer
• 2018In Fabric — Pam
• 2017The Big Think: Should We Go to Mars? — Narrator
• 2016ChickLit — Jen
• I Want My Wife Back — Bex
• 2016The Forgotten Children — Narrator
• Rosamunde Pilcher: Fighting for Her Family — Helen
• Countdown to Murder
• DCI Banks — Helen Morton
• 2009Captive for 18 Years: The Jaycee Lee Story — Narrator
• Hotel Babylon
• The Conspiracy Files — Narrator
• Agatha Christie's Marple — Hazel
• Doc Martin — Louisa Glasson
• 2004In Denial of Murder — Wendy Sewell
• Murder in Suburbia — DI Kate Ashurst
• 2003Real Men — Liz Fenton
• Real Men
• The Vice — PC Cheryl Hutchins
• 1996The Merchant of Venice — Jessica
• (All Quiet on the) Preston Front — Dawn
• 1994Look Me in the Eye — Ruth Wallace / Sian
• Peak Practice — Carol Dart
• 1992The Guilty — Nicky Lennon
• 1992Under the Sun — Linda
• The Upper Hand — Receptionist
• Screen Two — Ruth Wallace
• The Bill
• Art Sex Music — Director

Appearances as themselves (10)

• 2025Inside China: The Battle for Tibet — Self - Narrator (voice)
• 2024Scala Interviews — Self
• 2024Scala!!! — Self
• 2022Farewell Doc Martin — Self - Narrator (voice)
• Worlds Collide: The Manchester Bombing — Self - Narrator (voice)
• 2021Savile: Portrait of a Predator — Self - Narrator (voice)
• Trump Takes On the World — Self - Narrator (voice)
• Britain's Biggest Warship — Self - Narrator, Self - Narrator (voice)
• 2018Conspiracy Files: Murder in Washington — Herself
• 2007Windscale: Britain's Biggest Nuclear Disaster — Self - Narrator (voice)