If the year's first big superhero release marks the start of summer, then "Captain America: The Winter Soldier" means the season is already here. Soon we'll be inundated with blockbusters, so now's the time to catch up on the smaller films you might have missed. Here are five must-see movies, many available on-demand, to catch before summer's upon us:

Enough Said Julia Louis-Dreyfus and James Gandolfini create a romance so natural, so real, that you'll forget you're watching a movie.

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Tim's Vermeer In this documentary by Teller (of Penn and Teller), a Texas-based inventor undertakes a four-year journey to create a Vermeer painting from scratch. It's a triumph of visionary nerdism.

Don Jon Joseph Gordon-Levitt, making his writing and directing debut, plays a porn addict who meets his dream girl (Scarlett Johansson). It's funny, crass and surprisingly insightful.

The Armstrong Lie Alex Gibney's documentary on Lance Armstrong started out as a puff-piece, but the result is an unsparing portrait of a ruthless competitor.

Her This story of a human (Joaquin Phoenix) who falls for a computer (Johansson, again) was ignored by many moviegoers. Don't be one of them.