Beginning in the 1960s, Walters became a regular in Hammer Studio's horror/fantasy films, including "The Earth Dies Screaming"(1964), "Dracula--Prince of Darkness"(1966), "The Psychopath"(1966) "Frankenstein Must Be Destroyed!"(1970) and "Vampire Circus"(1971). He amassed numerous British television credits since the 1970s, notably in the classic "Cousin Bette" (1972), "Jeannie: Lady Randolph Churchill"(1975) and "Tinker, Tailor, Soldier, Spy"(1980).