 He also took the lead, playing psychiatric consultant Dr Edward Roebuck in BBC's "Maybury" in 1981.Stewart continued to play minor roles in films, such as King Leondegrance in John Boorman's "Excalibur" (1981), the character Gurney Halleck in David Lynch's "Dune" (1984) and Dr. Armstrong in Tobe Hooper's "Lifeforce" (1985).Stewart preferred classical theatre to other genres, asking "Doctor Who" actress Lalla Ward why she would work in science fiction or on television.