The most popular movies among NYTimes.com readers. A 15-year-old girl navigates a dangerous urban landscape in search of the brother whom she has hypnotized into believing he is a dog in director Bruce McDonald ‘s pop-infused, 21st century variation on The Catcher in the Rye. When the viewer first meets Tracey (Juno’s Ellen Page ), she is sitting naked in the back of a bus with only a flimsy …