An English schoolgirl suspects the foster brother she worships is a serial killer.
Acting
Jenny Agutter's trembling worship is genuinely unsettling.
Direction
Greene frames suburbia as a predator's hunting ground.
Score
Lurching from nursery innocence to jarring dissonance.

Director
David Greene
Trivia, insights & behind the scenes
Filmed in the actual home of producer Harry Saltzman, who found the script in his slush pile.
A rare British entry in the '70s 'stalker cinema' boom, overshadowed by Peeping Tom but arguably more interested in the watcher than the watched.