When Gene Siskel, a film critic for the Chicago Tribune, and Roger Ebert, winner of the Pulitzer Prize for his work at the Chicago Sun-Times, reluctantly agreed to collaborate on a new movie review show with PBS, there was at least as much sparring off-camera as on. Their antagonistic partnership made for great television, and their signature "Two thumbs up!" would become the most trusted critical brand in Hollywood. Singer details their rise from the local Chicago PBS station to multimillion-dollar contracts for a syndicated series. Ford shows how they influenced the way we talk about (and think about) movies to this day.