Billy Crudup character Dr. Philip Zimbardo
Michael Angarano character Christopher Archer
Ezra Miller character Daniel Culp / Prisoner 8612
Tye Sheridan character Peter Mitchell / Prisoner 819
Olivia Thirlby character Dr. Christina Maslach
Nelsan Ellis character Jesse Fletcher
Moisés Arias character Anthony Carroll
Nicholas Braun character Karl Vandy
Gaius Charles character Paul Vogel
Keir Gilchrist character John Lovett
Ki Hong Lee character Gavin Lee / Prisoner 3401
Thomas Mann character Prisoner 416
Logan Miller character Jerry Sherman / Prisoner 5486
Johnny Simmons character Jeff Jansen / Prisoner 1037
James Wolk character Mike Penny
Matt Bennett character Kyle Parker
Jesse Carere character Paul Beattie / Prisoner 5704
Brett Davern character Hubbie Whitlow / Prisoner 7258
James Frecheville character Matthew Townshend
Miles Heizer character Marshall Lovett
Jack Kilmer character Jim Randall / Prisoner 4325
Callan McAuliffe character Henry Ward
Benedict Samuel character Jacob Harding
Chris Sheffield character Tom Thompson / Prisoner 2093
Harrison Thomas character Andrew Ceros
Albert Malafronte character Father MacAllister
Danielle Lauder character Mary Ann
Jim Klock character Warren
Kate Butler character Mrs. Mitchell
James C. Victor character Mr. Mitchell
Fred Ochs character Professor Jim Cook
