X the Unknown (4K UHD, Limited Collector’s Edition, Region Free)

2026 marks the 70th anniversary of this suspenseful science-horror classic from legendary writer Jimmy Sangster. Often considered an unofficial part of the Quatermass franchise, the film makes its debut on Blu-ray and 4K UHD – the latest to be restored by the teams at Hammer and Silver Salt Restoration.

When a soldier dies from apparent radiation poisoning, the Atomic Energy Commission sends scientist Dr. Royston (Oscar-winner Dean Jagger) to investigate. Despite extensive testing no source can be found – until a mysterious radioactive, mud-like entity resurfaces and begins claiming more victims. What do you do when the killer cant be stopped – or even understood?

This Limited Edition comprises:

• Four discs in a stylish digipak, including 2 UHD and 2 Blu-ray, with the Hammer content duplicated across both formats.
• Three iterations of X the Unknown: the widescreen 1.66:1 UK Theatrical Version, the fullscreen 1.37:1 As-Film