
Karl Johnson is a Welsh actor, appearing on stage, film and television. His most notable role to date is the title role in Derek Jarman's 1993 film Wittgenstein and those of Cato the Younger in the television drama series Rome and of Twister Turrill in the BBC costume drama Lark Rise to Candleford.

National Theatre Live: The Crucible
2023

National Theatre Live: Under Milk Wood
2021

Dream Horse
2021

Endgame & Rough for Theatre II
2020

The Last Vermeer
2019

Peterloo
2018

King Lear
2018

Kaleidoscope
2017

The Death of Stalin
2017

Winter Thaw
2016
Aberfan: The Green Hollow
2016

The Carer
2016

Mother
2016

National Theatre Live: Hamlet
2015

Mr. Turner
2014

The Gospel According to St Derek
2014

Under Milk Wood
2014
Mr Invisible
2013

The Sea
2013

Good Vibrations
2012

The Deep Blue Sea
2011

The Pier
2011

National Theatre Live: Frankenstein
2011

Third Star
2010

Is Anybody There?
2009

I Know You Know
2009

The Edge of Love
2008

Dog Altogether
2007

Hot Fuzz
2007

The Trial of Tony Blair
2007

Four Last Songs
2007

Copying Beethoven
2006

The Illusionist
2006

The Chatterley Affair
2006

Elizabeth David: A Life in Recipes
2006

Heidi
2005

Frozen
2005

When I'm Sixty-Four
2004
England Expects
2004

77 Beds
2003

Tomorrow La Scala!
2002

Pure
2002

Love Is the Devil: Study for a Portrait of Francis Bacon
1998

Saint-Ex
1996

Wittgenstein
1993

Close My Eyes
1991

Let Him Have It
1991

The Shawl
1989

The Black and Blue Lamp
1988

A Prayer for the Dying
1987

Prick Up Your Ears
1987

The Magic Shop
1982

Sons and Lovers
1981

The Tempest
1979
Cold Harbour
1978

Jubilee
1978

Chips with Everything
1975
Ladies and Gentlemen

Truelove
2024

The Following Events Are Based on a Pack of Lies
2023

Wolf
2023

Halo
2022

Suspicion
2022

Too Close
2021

Born to Kill
2017

Mum
2016

Lovesick
2014

Atlantis
2013

It's Kevin
2013

Call the Midwife
2012

Merlin
2008

Lark Rise to Candleford
2008

Ancient Rome: The Rise and Fall of an Empire
2006

New Tricks
2004
What's Your Problem?
2002

Born and Bred
2002

David Copperfield
1999

Vanity Fair
1998

Midsomer Murders
1997

The Lifeboat
1994

Rules of Engagement
1989

A Tale of Two Cities
1989

Agatha Christie's Poirot
1989

The Play on One
1988

ScreenPlay
1986

The Mysteries
1985

The Bill
1984

Night Court
1984

Bergerac
1981

Sons and Lovers
1981

Shoestring
1979
The Other Side
1979

Rainbow
1972

BBC Play of the Month
1965

The Sooty Show
1955