Captain America: The First Avenger (2011) for $17.99

The Marvel Comics superhero Captain America was born of World War II, so if you're going to do the origin story in a movie you'd better set it in the 1940s. But how, then, to reconcile that hero with the 21st-century mega-blockbuster The Avengers, a 2012 summit meeting of the Marvel giants, where Captain America joins Iron Man and the Incredible Hulk and other super pals Stick around, and we'll get to that.