Exclusive: First Official Trailer for The Belko Experiment! On March 17, 2017, you’ve heard about the BEAUTY, now take a look at the BEAST. Starring Tony Goldwyn, John Gallagher Jr., Adria Arjona, Michael Rooker, John C McGinley, Sean Gunn, Melonie Diaz. Written by James Gunn. Directed by Greg McLean.