Prison is a 1987 horror film directed by Renny Harlin and starring Viggo Mortensen, Tom Everett, Kane Hodder, Lane Smith, and Tommy Lister.

In Wyoming, corrupt prison guard Eaton Sharpe (Lane Smith) watched as an innocent man named Charles Forsyth (Kane Hodder) was executed in Creedmore Penitentiary's electric chair in 1964, for a murder that he did not commit.

Katherine Walker (Chelsea Field), a reform-minded member of the Department Of Corrections, objects to Sharpe's posting as the warden, not just because of his archaic ways, but because she suspects that he's hiding much more than he allows to be revealed.

On the surface, Sharpe remains in denial, blaming the growing body count on troublesome inmates, while his guilty conscience propels him to new heights of sadism and erratic behavior.

A majority of the extras portraying prisoners were real-life inmates of the Wyoming State Penitentiary, including former stuntman Stephen E. Little, who was serving a sentence of manslaughter at the time.