Francis George ("Frank") Middlemass (28 May 1919 – 8 September 2006) was an English actor, who even in his early career played older roles. He is best remembered for his television roles as Rocky Hardcastle in As Time Goes By, Algy Herries in To Serve Them All My Days and Dr. Alex Ferrenby in Heartbeat. Middlemass was also active in the Royal Shakespeare Company and was the fourth and final actor to play Dan Archer in The Archers.