Ian McNeice (born 2 October 1950) is a prolific English screen, stage, and television character actor. Description above from the Wikipedia article Ian McNeice, licensed under CC-BY-SA, full list of contributors on Wikipedia

Ian McNeice plays as Bert Large in Doc Martin.
Ian McNeice is the top #1 member of the cast and appears in 71 episodes.

Selina Cadell plays as Mrs Tishell in Doc Martin.
Selina Cadell is the top #2 member of the cast and appears in 71 episodes.

Jake Wood plays as Jimmy Dobbs in Doc Martin.
Jake Wood is the top #3 member of the cast and appears in 47 episodes.

Katherine Parkinson is a British stage, film and television actress, comedian and writer, best known for playing lead character Jen Barber in the television comedy series "The IT Crowd".

Katherine Parkinson plays as Pauline Lamb in Doc Martin.
Katherine Parkinson is the top #4 member of the cast and appears in 47 episodes.

From Wikipedia, the free encyclopedia. Dame Eileen June Atkins, DBE (born 16 June 1934) is an English actress and occasional screenwriter. Description above from the Wikipedia article Eileen Atkins, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Eileen Atkins plays as Ruth Ellingham in Doc Martin.
Eileen Atkins is the top #5 member of the cast and appears in 24 episodes.

John Marquez plays as PC Penhale, PC Joe Penhale in Doc Martin.
John Marquez is the top #6 member of the cast and appears in 24 episodes.

Jessica Ransom plays as Morwenna Newcross in Doc Martin.
Jessica Ransom is the top #7 member of the cast and appears in 24 episodes.

Lucy Punch (born 30 December 1977, height 5' 8" (1,73 m)) is an British actress, best known for her roles in both the television show Doc Martin on ITV as receptionist Elaine Denham and for her starring role in the American programe The Class as Holly Ellenbogen, on CBS, and also in the film Hot Fuzz as Eve Draper.

Lucy Punch plays as Amanda in Doc Martin.
Lucy Punch is the top #8 member of the cast and appears in 17 episodes.

Chris O'Dowd (born 9 October 1979) is an Irish comedian and actor.

Chris O'Dowd plays as Tom in Doc Martin.
Chris O'Dowd is the top #9 member of the cast and appears in 10 episodes.

Louise Jameson (born 20 April 1951) is an English actress, with a wide variety of British TV and theatre credits. She is best known for her appearances in British TV series EastEnders, Doctor Who, Bergerac, and Tenko.

Louise Jameson plays as Eleanor Glasson in Doc Martin.
Louise Jameson is the top #10 member of the cast and appears in 8 episodes.