Jonathan Newth
Jonathan Newth is a British actor who has appeared extensively in British television drama for over 50 years. Newth trained at the Central School of Speech and Drama. Newth's theatre work includes appearances with the RSC, in the West End and on Broadway. Newth's television credits include Emergency Ward 10, The Six Wives of Henry VIII, Ace of Wands, The Troubleshooters, Z-Cars, Callan, Van der Valk, The Brothers, Softly, Softly, Poldark, Doctor Who (Underworld), Notorious Woman, Secret Army (Barsacq), The Professionals, The Nightmare Man, The Day of the Triffids, Tenko (Colonel Clifford Jefferson), Triangle, Angels, Juliet Bravo, After Henry, The Adventures of Sherlock Holmes ("The Bruce-Partington Plans"), Boon, Bugs, The Bill, Agatha Christie's Poirot (Dumb Witness), Peak Practice and Heartbeat.
Known for

Agatha Christie's Poirot
1989

Play for Today
1970

Doctor Who
1963

Casualty
1986

The Crown
2016

The Crown
2016

Peak Practice
1993

Sherlock Holmes
1984

Heartbeat
1992

Heartbeat
1992

ITV Playhouse
1967

ITV Playhouse
1967

The Professionals
1977

Poldark
1975

Secret Army
1977

Tenko
1981

Tenko
1981

Van der Valk
1972

New Scotland Yard
1972

Hammer House of Mystery and Suspense
1984

The Return of Sherlock Holmes
1986

Juliet Bravo
1980

Callan
1967

Ace of Wands
1970