Late in life, Buster Keaton appeared in "The Railrodder" (1965), a National Film Board of Canada-produced silent comedy/travelogue short following the comic legend on a hapless coast-to-coast ride on a motorized handcar. The documentary "Buster Keaton Rides Again" offers a revelatory look at 69-year-old Buster on the set, improvising scenes and mugging with his wife. Then, made to mark the Canadian centennial, the Oscar-nominated "Helicopter Canada" offers an eye-in-the-sky survey of the nation's landscapes and landmarks as well as current events, including a walk-on by The Beatles. 105 min. total. Standard and Widescreen; Soundtrack: English; Subtitles: English (SDH); audio commentary; bonus shorts "Hors-d'oeuvre" (1960), "My Financial Career" (1962), "Christmas Tree Decoration" (1963), "The Ride" (1963), "The Railrodder" (1965), "The Quiet Racket" (1966), "Canada the Land" (1970), "The Awful Fate of Melpomenus Jones" (1983); "Smilebox" version of "Helicopter Canada."