The Reel Science Film Series returns for its second edition with a new slate of cult science-fiction movies every Friday of May. The series is a collaboration between San Diego Natural History Museum (The Nat), Digital Gym Cinema, and the Film Geeks San Diego. This week’s screening of 'Back to the Future' will feature commentary from UC San Diego physicist Brian Shotwell. In this 1980s sci-fi classic, small-town California teen Marty McFly (Michael J. Fox) is thrown back into the 50s when an experiment by his eccentric scientist friend Doc Brown (Christopher Lloyd) goes awry. Traveling through time in a modified DeLorean, Marty encounters young versions of his parents (Crispin Glover and Lea Thompson), and must make sure that they fall in love or he’ll cease to exist.