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 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.