The Cell (en Inglés) - Stephen Myler

Matt is in a high security British jail - undercover with a serial killer for a cell mate. His job, find out how many did this man kill, where are the bodies, try and stay alive and not become another victim. Before entering the cell - a prison guard is asked to make it look genuine - beating Matt with a truncheon as he enters the cell to join his dangerous new cell mate. Matt must use all his skills a criminal psychologist to get this man to talk. Will he survive the next forty eight hours? Along the way he discovers the serial killer has an apprentice - ready to take over his killing fields. Can Matt Murray stop him in time?