Watch: First Trailer For 'The Stanford Prison Experiment' Puts Billy Crudup, Ezra Miller, Tye Sheridan & More Behind Bars

The story is true, and even decades later, the story remains shocking and unbelievable. In 1971, Dr. Philip Zimbardo assigned twenty-four male undergraduates to be either a guard or a prisoner, set up a prison simulation, and then sat back to watch the results unfold. But he never realized what he was unleashing. Soon the "guards" began giving in to their worst impulses to maintain control, the prisoners were treated brutally, and things soon spiralled out of control. This is the story.

"The Stanford Prison Experiment," directed by Kyle Patrick Alvarez, brings together the ensemble of Billy Crudup, Ezra Miller, Tye Sheridan, Olivia Thirlby, Michael Anganaro, Logan Miller, Thomas Mann, Keir Gilchrist, Johnny Simmons, Moises Arias, Jack Kilmer, Chris Sheffield, Ki Hong Lee, and James Frecheville, to tell the tale and it's a movie you won't want to miss. We named it one of The Best Films Of The 2015 Sundance Film Festival with our critic calling it...