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.

Filmography

• Truelove — Tom
• 2023National Theatre Live: The Crucible
• The Following Events Are Based on a Pack of Lies — Bill
• Wolf — Colonel Frink
• Halo — Hierarch Truth (voice)
• Suspicion — Eric Cresswell
• 2021Dream Horse — Kerby
• 2021National Theatre Live: Under Milk Wood — Richard Jenkins
• Too Close — James de Cadenet
• 2020Endgame & Rough for Theatre II — Nagg
• 2019The Last Vermeer — Bernard Bakker
• 2018King Lear — Fool
• 2018Peterloo — Lord Sidmouth, the Home Secretary
• Born to Kill — Mr. Williams
• 2017Kaleidoscope — John
• 2017The Death of Stalin — Dr. Lukomsky
• 2016Aberfan: The Green Hollow
• 2016Mother — Old Man in Café
• Mum — Reg
• 2016The Carer — Joseph
• 2016Winter Thaw — Stepanovich
• 2015National Theatre Live: Hamlet — Ghost / Gravedigger
• Lovesick — Richard
• 2014Mr. Turner — Mr. Booth
• 2014Under Milk Wood — Drowned / Voice
• Atlantis — Itheus
• It's Kevin — Various
• 2013Mr Invisible — The Handler
• 2013The Sea — Blunden
• Call the Midwife — Mr. Masterson
• 2012Good Vibrations — George Hooley
• 2011National Theatre Live: Frankenstein — De Lacey
• 2011The Deep Blue Sea — Mr. Miller
• 2011The Pier — Larry McCarthy
• 2010Third Star — Ticket Seller
• 2009I Know You Know — Ernie
• 2009Is Anybody There? — Arthur (uncredited)
• Lark Rise to Candleford — Twister Turrill
• Merlin — Taliesin
• 2008The Edge of Love — Dai Fred
• 2007Dog Altogether — Jack
• 2007Four Last Songs — Erico
• 2007Hot Fuzz — PC Bob Walker
• 2007Ladies and Gentlemen — Uncle Philip
• 2007The Trial of Tony Blair — Father Lunt
• Ancient Rome: The Rise and Fall of an Empire — Marcellus
• 2006Copying Beethoven — Stefan Holtz
• 2006Elizabeth David: A Life in Recipes — Norman Douglas
• 2006The Chatterley Affair — Mr. Justice Byrne
• 2006The Illusionist — Doctor / Old Man
• 2005Frozen — Coastguard Bill
• 2005Heidi — Old Man
• 2004England Expects
• New Tricks
• 2004When I'm Sixty-Four — Billy
• 200377 Beds — Spiritual Father
• Born and Bred — Alec Rossendale
• 2002Contagion — Ferrin
• 2002Pure — Granddad
• 2002Tomorrow La Scala! — Sydney
• What's Your Problem?
• David Copperfield — Tungay
• 1998Love Is the Devil: Study for a Portrait of Francis Bacon — John Deakin
• Vanity Fair — Major Loder
• Midsomer Murders — Derek Lockwood
• Dalziel and Pascoe — Steve Earle
• 1996Saint-Ex — Didier Daurat
• An Independent Man — Bill Rutherford
• The Lifeboat — Hughie Jones
• 1993Wittgenstein — Ludwig Wittgenstein
• 1991Close My Eyes — Colin
• 1991Let Him Have It — Parris
• A Tale of Two Cities — Solomon Pross/'John Barsad'
• Agatha Christie's Poirot — Saunders
• Rules of Engagement — Dave Gillespie
• 1989The Shawl — Charles
• 1988The Black and Blue Lamp — PC "Taffy" Hughes
• The Play on One — Charles
• 1987A Prayer for the Dying — Fitzgerald
• 1987Prick Up Your Ears — Douglas Orton
• ScreenPlay — P.C. Taffy Hughes
• The Mysteries — Jesus / Abel
• Night Court — Dave Costanza
• The Bill
• 1982The Magic Shop
• Bergerac — Henry Morant
• 1981Sons and Lovers — Paul Morel
• Sons and Lovers — Paul Morel
• 1979Only Connect — Colin
• Shoestring — Dennis Philips
• The Other Side — Colin
• 1979The Tempest — Ariel, an airy spirit
• 1978Cold Harbour — Geoff
• 1978Jubilee — Sphinx
• 1975Chips with Everything — Wilfe Seaford
• BBC Play of the Month — Wilf Seaford
• Untitled 13

Appearances as themselves (3)

• 2014The Gospel According to St Derek — Self
• Rainbow — Himself (singer)
• The Sooty Show — Himself