David Greene's beautifully directed film starring Jenny Agutter as 14-year-old Wynne has been described as a horror, but I would suggest it's really a dark - a very dark - coming-of-age film.
Agutter is as charming as she always is, giving her typically unaffected, honest performance as an adolescent fascinated by, and in love with, her stepbrother. His name is George, he is played by Bryan Marshall, and he is twice her age. Annoyingly, Wynne's friend Corinne (Claire Sutcliffe)may also have designs on the rugged charmer. Simon Ward, who was a prolific film and television actor around this time, is also on hand as the unnamed Conductor.
This is one of those films that could only really exist in the late '60s/early '70s. Naivety is mixed with sexuality, and even when under the influence of excessive alcohol, do the youngsters ramble in perfectly received English. It's a charming story in many ways, despite the dark twists and turns it takes, and there's a genuine sense of jeopardy towards the end.