Skip Morgan, self-styled nautical adventurer, is hired by Baron Keller to smuggle an old friend out of Eastern Europe. But things are not what they seem: kidnapped, beaten and hunted from all sides, Morgan must use all his cunning just to survive.

EXTRAS: 3-disc 4K UHD & Blu-ray Limited Collector’s Edition. Discover three distinct versions of the film alongside a wealth of brand-new extras and archival material: Three versions of Break in the Circle: As-filmed version, UK cinema widescreen version, Black-and-white re-edited US cinema version, Presented across one UHD and two Blu-rays, with content duplicated across both formats, Subtitles in English, French, Italian, Spanish and German across every version of the film, Special Features. Eurocrime – a new feature exploring Hammer’s unique contribution to European crime thrillers, with Sergio Angelini, Laura Mayne and Barry Forshaw, Hammer in Hamburg – then-and-now comparison of the film’s German locations, Hammer in Cornwall – then-and-now comparison of the film’s UK locations, Brand-new commentary with film historian Richard Holliss and author/screenwriter Gavin Collinson, Brand-new commentary with film critic Adrian Martin, Gallery of stills and publicity material, accompanied by selections from Doreen Carwithen’s score, Collector’s Booklet. Featuring new writing and archival material, including: Wayne Kinsey on the making of this fast-paced thriller, Miriam Balanescu on Forrest Tucker’s small-but-significant British film output, Wayne Kinsey on the use of Oakley Court in Hammer productions, Neil Sinyard comparing the original novel with the finished film, Sarah Morgan profiling Eva Bartok, Archive interview with director Val Guest