Stallone plays Ray Breslin, the world's foremost authority on structural security. He's analyzed nearly every high security prison. After being framed by persons unknown, all of Breslin's ingenuity and expertise are about to be put to work in the most challenging test he's ever faced: escaping from a high-tech prison facility that's design is based on his own protocols.
Schwarzenegger plays Emil Rottmayer, a complex inmate with multiple shades of gray. He's the guy who fights to keep the prisoners from losing their humanity in their darkest hour as they struggle together to stay alive.
Jim Caviezel plays Hobbes, the warden of the Tomb. This is the type of prison facility that deals with inmates that no government wants on its books.
Vinnie Jones plays the lead guard of the maximum-security facility, Drake.
Curtis "50 Cent" Jackson plays Hush, Ray Breslin's right-hand man and high-technology expert. Buttoned-down with street lurking just below the surface, Hush is aptly named because when he speaks, it is just above a whisper...but it's a whisper with attitude and edge that can turn from soft to drop dead serious in the blink of an eye.
Vincent D'Onofrio plays Lester Clark, Breslin's business partner and CEO of B&C Security, their independent security company hired by the Federal Bureau of Prisons to test the integrity of their maximum-security facilities nationwide.
Amy Ryan plays Abigail Ross, jack-of-all trades and one of Beslin's closest confidants at B&C Security.
Sam Neil is cast as Dr. Emil Kaikev, the prison doctor embedded within the Tomb, who is sympathetic to Breslin's plight.