Acting
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.

Agatha Christie's Poirot
1989

Play for Today
1970

Casualty
1986

The Crown
2016

Doctor Who
1963

Sherlock Holmes
1984

ITV Playhouse
1967

Heartbeat
1992

Peak Practice
1993

The Professionals
1977

Van der Valk
1972

Secret Army
1977

New Scotland Yard
1972

Hammer House of Mystery and Suspense
1984

Tenko
1981

Juliet Bravo
1980

Callan
1967

Poldark
1975

Mystery and Imagination
1966

The Return of Sherlock Holmes
1986

Ace of Wands
1970

After Henry
1988

Rockliffe's Babies
1987

The Six Wives of Henry VIII
1970

North Sea Hijack
1980

Ladies in Charge
1986

Napoleon and Love
1974

Pretenders
1972

The Day of the Triffids
1981

The Walls of Jericho
1981

Incognito
1997

The Affair of the Necklace
2001

The Elusive Pimpernel
1969

The Lost Honour of Christopher Jefferies
2014

The Man in the Iron Mask
1968

Notorious Woman
1974