X: The Unknown

You don't need another "hidden gem sci-fi" list — X: The Unknown in the UK on Amazon Prime Video is simply a strong one. It knows exactly what kind of film it is from the opening scene, and never loses that thread. With 74 viewer ratings on TMDB, this is not a title flying under the radar. Watch it for Dean Jagger — the performance elevates material that could easily tip into self-seriousness. Available now on Amazon Prime Video — press play and find out why people keep recommending it.

Whatever else is competing for your attention this week, X: The Unknown is worth clearing space for. What makes X: The Unknown work is that the ideas never crowd out the people having them. Army radiation experiments awaken a subterranean monster from a fissure that feeds on energy and proceeds to terrorise a remote Scottish village. An American research scientist at a nearby nuclear plant joins with a British investigator to discover why the victims were radioactively burned and why, shortly thereafter, a series of radiation-related incidents are occurring in an ever-growing straight line away from the fissure. Dean Jagger and Leo McKern lead a cast that never lets the concept overwhelm the characters. It was released in 1956. The world-building is meticulous enough to sustain multiple rewatches, with details early on that only make sense later. It knows exactly what it is, and does not try to be anything else.

Sci-fi fans who want ideas alongside the spectacle will find X: The Unknown genuinely rewarding. It does not lean on comparisons to make its case. Short enough to finish in one sitting, substantial enough to feel satisfying. Dean Jagger's performance is the anchor the more ambitious moments need. The world-building pays off in ways you will not anticipate on a first watch.

X: The Unknown was released in 1956, directed by Leslie Norman. The full 81-minute film is available to watch now. Find exactly where it's streaming below, and TV Butler Pro makes it effortless to track your progress as you go. Just search the name, and Butler finds it instantly, tells you which service has it, and remembers exactly where you left off.