Richard Widmark plays a hardened cold-war warrior and captain of the American destroyer USS Bedford. Sidney Poitier is a reporter given permission to interview the captain during a routine patrol. Poitier gets more than he bargained for when the Bedford discovers a Soviet sub in the depths and the captain begins a relentless pursuit, pushing his crew, and the on-screen tension, to breaking point in this chilling cold-war tale of cat and mouse.

In March 1963, a black mass was held at a ruined church in Clophill, Bedfordshire by a coven of dark witches. Tombs were looted, animals sacrificed and human bones arranged during a macabre ceremony. Further defilements continued at Clophill in the following years, with cattle in nearby fields found mutilated, evidence of necromancy discovered and perpetual sightings of paranormal activity witnessed at the isolated ruin. 50 years on from the original incident, the Clophill legend remains etched on the psyches of the local populace. In 2010, a documentary team was assembled to investigate the legend of the Clophill witches and to try and uncover the truth behind the paranormal events. What followed during that long weekend at Clophill was a terrifying journey into the unknown.