Four aspiring astronauts are sent on a simulated mission to a distant planet to test the psychological effects of deep space travel. Locked away for 400 days, the crew's mental state begins to deteriorate when they lose all communication with the outside world. Forced to exit the ship, they discover that this mission may not have been a simulation after all. 400 Days stars Brandon Routh (Superman Returns, DC's Legends of Tomorrow) Caity Lotz (Arrow), Ben Feldman (Mad Men) and Tom Cavanagh (The Flash).