Silent Rage is a 1982 American action crime science fiction film directed by Michael Miller. It stars Chuck Norris as a sheriff who must stop a mentally ill man (Brian Libby) who goes on a rampage after being granted near-indestructibility in a medical experiment. It grossed $10.5 million on release. Plot In a small Texas town, John Kirby, a mentally ill man, kills two members of the family with whom he was staying. Sheriff Daniel "Dan" Stevens and his deputy Charlie, respond and eventually arrest John, but he breaks out of the handcuffs, overpowers the other officers and grabs a shotgun, forcing the officers to shoot him. Severely injured and near death, John is transported to an institute where his psychiatrist, Dr. Thomas "Tom" Halman, works along with Dr. Phillip Spires and Dr. Paul Vaughn, two doctors and geneticists. To save John, Phillip proposes treating him with a formula created by himself and Paul to enhance cellular strength and regeneration. Tom objects to its use due to John's psychosis, and Phillip pretends to agree but later administers the formula anyway once Tom leaves. Revived and rendered nearly mute but virtually invulnerable, John escapes from the institute and tracks Tom to his home, having overheard Tom telling Phillip to allow John to die earlier. Meanwhile, Dan invites Tom's sister Alison, whom he is romancing, on a trip. John breaks into Tom's home and the two fight. Despite shooting John several times and pushing him down a flight of stairs, Tom is killed. Tom's wife Nancy finds her husband's body and is killed by John as well. Alison arrives to pick up her gear for the trip and discovers her brother and sister-in-law's corpses, but John flees as Dan and Charlie arrive with the police. Dan and Charlie take Alison to the institute, unaware that John has also returned there to get Phillip and Paul to treat his wounds. Realizing that the situation is out of control, Phillip leaves to examine samples while Paul attempts to kill John by injecting him with acid. John survives and kills Paul after a brief struggle by stabbing him with the syringe. After finding Paul's body, Phillip returns to his office, where he briefly speaks to John about the success of their experiment. John initially seems to understand Phillip but ultimately snaps his neck. With Dan at the county coroner's office, Charlie and Alison discover John