Death Line

Death Line is a 1972 horror film directed by Gary Sherman in his directorial debut, and starring Donald Pleasence, Norman Rossington, David Ladd, Sharon Gurney, Hugh Armstrong, and Christopher Lee. Its plot follows a university student and her boyfriend who, after witnessing a man disappear in the London Underground, become embroiled in an investigation into subsequent related disappearances. It is credited as one of the earliest examples of a cannibal film, released only months after Man from Deep River and nearly a decade before Cannibal Holocaust (1980).

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.