Gerald Harper (born 15 February 1929) is an English actor, best known for his work on television, having played the title roles in Adam Adamant Lives! (1966–67) and Hadleigh (1969–76). He then returned to his main love, the theatre. His classical work includes playing on Broadway with the Old Vic company, playing Iago at the Bristol Old Vic and Benedick at the Chichester Festival Theatre. Other plays in London included Crucifer of Blood at the Haymarket Theatre, House Guest, A Personal Affair, Suddenly at Home and Baggage. He has directed many plays, amongst them a production of Blithe Spirit in Hebrew at the Israeli National Theatre.