SANDWICHED IN: Pow! The History of Superhero Movies. Film historian/author Clive Young explores 80 years of super-powered cinema in just 80 minutes. The program traces the evolution of these exciting films, from the Saturday-morning serials of yesteryear to the box-office blockbusters of today. In each case, audiences see how Hollywood’s vision of superheroes has changed to reflect the times — and the technologies available. 12:10 p.m.