Early lifeBorn in Guildford, Surrey, and abandoned as a baby, Evans was educated at the orphanage boarding schools run by the Shaftesbury Homes, first at Fortescue House School in Twickenham and then at Bisley Boys' School in Bisley, Surrey. His acting ability was recognised at an early age and he often played the leading roles in school plays. Evans attended the Italia Conti Academy and later won a John Gielgud Scholarship to study at the Central School of Speech and Drama.
CareerOne of Evans' first television credits was in the soap opera Crossroads in 1964. He subsequently played the lead role in the film Here We Go Round the Mulberry Bush (1967), where he was cast as a sex-starved boy who finds it difficult to lose his virginity.
His first major television role was in the sitcom Doctor in the House (1969–70), based on Richard Gordon's series of novels already turned in to a feature film series. Evans starred as the earnest but gullible Michael Upton. Following the show's success, he starred in the sequel to the series, Doctor At Large in 1971. Evans enjoyed working with his fellow actors and later described these as the best years of his life.
In 1975, he had the lead role in Stanley Long's sex comedy Adventures of a Taxi Driver. Despite the film's success, Evans declined to appear in the sequel.
Evans starred as Jeremy Brown in the ITV sitcom Mind Your Language (1977–79), which was a humorous look at an evening class tutor attempting to teach immigrants English. Most of the characters were foreign stereotypes; it was immensely popular, both in the UK and internationally, and especially in the countries the actors portrayed. The series was written by TV scriptwriter Vince Powell, and was adapted for American TV as What a Country! in 1986.
One of Evans' last appearances on British television was in 1982's Emery Presents series Legacy of Murder, alongside Dick Emery.