Bonar Stewart Bain (born February 4, 1923 – February 18, 2005) was a Canadian actor. He was the identical twin brother of actor Conrad Bain, who starred in Diff'rent Strokes as Phillip Drummond. He once played a fictional “evil” twin to Conrad (“Hank Bain”) in an episode of "SCTV". He also portrayed Arthur's (Conrad Bain) twin brother Arnold on "Maude". 