Karl Johnson (born 1 March 1948) is a Welsh actor, who has worked on stage, film and television. His notable roles to date include 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. Johnson is the recipient of an honorary doctorate from Birmingham City University.

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https://en.wikipedia.org/wiki/Karl_Johnson_(actor)