400 Days is a 2015 American science fiction film written and directed by Matt Osterman and starring Brandon Routh, Caity Lotz, Ben Feldman, and Dane Cook (also serving as executive producer) as astronauts sent on a 400-day-long simulated mission to a distant planet, to test the psychological effects of deep space travel. In the United States, the film premiered in theaters, on-demand, and digitally on January 12, 2016.