Three teenagers encounter a ghost who is in limbo until he retrieves his lost head. They do their parts to help him find it.
Practical Effects
The head prop looks like a discount store mannequin. Iconic.
Acting
Clive Revill's ghost commits harder than the script deserves.

Director
Peter Graham Scott
Trivia, insights & behind the scenes
Director Peter Graham Scott later produced The Avengers TV series, proving everyone starts somewhere.
Part of a 1950s wave of 'teen horror' films cashing on Hammer's success, but with 1% of the budget and 100% more polite ghosts.