To those familiar with Canadian television, actor Patrick McKenna will be most commonly associated with his comedic portrayal of nerdy, buck-toothed Harold Green, nephew of Possum Lodge handyman Red Green, on the madcap CBC sitcom The Red Green Show.McKenna officially debuted on film in 1980, with a bit part in Robert Downey Sr.'s raunchy teen farce Up the Academy, but subsequently broke away from entertainment for around a decade before returning to big- and small-screen productions in the late '80s. In terms of theatrical outings, the actor racked up bit credits in films including the John Candy farce Who's Harry Crumb? (1989) and the Canadian social issue drama Ordinary Magic (1993), starring Paul Anka. On network television, McKenna did guest bits on programs including Eerie, Indiana and Due South, but Red Green remained his bread and butter; he remained with that program throughout its long run, from 1991 through 2006. In 2007, McKenna tackled a small supporting role in Re-Animator director Stuart Gordon's disturbing psychological thriller Stuck.