With his keen observational eye and ear, Canadian actor and writer Mike Myers created some of the most memorable comedic characters in TV and film history. From the time of his American breakout on “Saturday Night Live” (NBC, 1975- ) in the early 1990s, Myers’ success lay in his fully-realized, heavily detailed characterizations and his spot-on mimicry. In an era of cynical insider comedy like “Seinfeld” (NBC, 1989-1998), Myers also set himself apart with affable, silliness that was refreshingly free from hip irony or mean-spirited intent. The outrageously funny site gags in the “Austin