Mainwaring, in the series' 1975 Christmas episode "My Brother and I". While Dad's Army was not in production, Lowe's work continued to include stage roles. In 1968, he was invited by Sir Laurence Olivier to join the National Theatre at the Old Vic, to play divorce solicitor A.B. Raham in Somerset Maugham's Home and Beauty. He returned to the company in 1974 to play Stephano in Peter Hall's production of The Tempest, starring Sir John Gielgud. In the same year he appeared as Ben Jonson alongside Gielgud's Shakespeare in Edward Bond's Bingo at the Royal Court Theatre. Lowe also had prominent parts in several films directed by Lindsay Anderson, including if.... (1968) and O Lucky Man! (1973), for which he won a BAFTA for Best Actor in a Supporting Role. His other film parts during this period included Spike Milligan's surreal The Bed Sitting Room (1969), in which he mutates into a parrot. He played a drunken butler in The Ruling Class (1972) with Peter O'Toole, and theatre critic Horace Sprout in the horror film Theatre of Blood (1973), in which the character is murdered by a deranged actor played by Vincent Price. On television, Lowe appeared twice as a guest performer on The Morecambe and Wise Show (1971 and 1977), alongside Richard Briers in a series of Ben Travers farces for the BBC, as the pompous Dr Maxwell in the ITV comedy Doctor at Large (1971) and as Redvers Bodkin, a snooty, old-fashioned butler, in the short-lived sitcom The Last of the Baskets (1971–72). Between 1971 and 1973 Lowe joined Dad's Army colleague Ian Lavender, on the BBC radio comedy Parsley Sidings and he played Mr Micawber in a BBC television serial of David Copperfield (1974). He employed a multitude of voices on the BBC animated television series Mr. Men (1974), in which he was the narrator. In 1972, Lowe also recorded the novelty songs "How I Won The War" and "My Little Girl, My Little Boy". While touring at coastal theatres with his wife, Lowe used his 1885 former steam yacht Amazon as a floating base. He bought Amazon as a houseboat in 1968, but realised her potential and took her back to sea in 1971; this vessel is still operating in the Mediterranean. The ship had a bar with a semicircular notch cut halfway along, to enable both the portly figure of Lowe and his wife to