Fortress (1992)

Set in a dystopian future, 2017, ex-army officer John Henry Brennick and his wife Karen are attempting to cross the US-Canada border to Vancouver to have a second child. Strict one-child policies forbid a second pregnancy, but the couple believe they are justified because their first child died at birth. Brennick is caught and sentenced to 31 years in a private maximum security prison run by the "MenTel Corporation". To maintain discipline all inmates are implanted with "Intestinators" which induce severe pain or death, for serious infractions, as a form of physical control and mental conditioning. The prison is co-run by Director Poe, who oversees Zed-10, a computer that monitors day-to-day activities and represents MenTel. The prison itself is located over a deep pit that can only be crossed by a retractable bridge, while the prisoners are kept in overcrowded cells secured by laser walls.