He acted on television and in feature films in both the United Kingdom and Australia. Some of his British film roles include Tamahine, The Haunted House of Horror, Cromwell, Adventures of a Private Eye, and The Legend of the 7 Golden Vampires as Leyland Van Helsing. He played the role of Mike Abbott in sit-com series Bless This House during its entire 1971-1976 run.
Due to prior commitments he did not feature in the film version of the series.
Other roles in Australia included a lead role in sex comedy feature film Pacific Banana (1981), and an appearance in prison based soap opera Punishment. He was also one of the main characters in The Timeless Land, playing the role of John MacArthur.
He played one of the supporting roles in the rock series Sweet and Sour for American Broadcasting Company. Company-hosted Good Morning Sydney with Maureen Duval. Briefly he was the advertising executive for Rolling Stone magazine and hosted, produced and co-hosted Midweek Live for DDQ television Foreign 18 months Stewart was the senior producer for FNQTV in Cairns.
Stewart suffered a stroke in 2003 and after years of heavy smoking also developed emphysema.
His death on 22 November 2015 was announced by his official website.