Fear in the Night

"Fear in the Night" (1972) starring Judy Geeson, Joan Collins, Ralph Bates and Peter Cushing is a Hammer horror movie about a woman who moves in to her new husband's home on the grounds of a boys' school and keeps getting attacked by a one-armed stranger.

Peggy Heller (Geeson) is recovering from a nervous breakdown and has just married Robert Heller (Bates), a teacher at a boys' school in the English countryside.  On the eve of moving to her new home, she is attacked by a one-armed intruder who has a prosthetic arm.  Her landlady and new husband have a hard time believing her because there is no evidence and of her recent breakdown.

The couple moves into the a cottage on the school grounds between quarters and Peggy wanders through the old Tudor school which is currently empty of students.  She also meets the headmaster and his wife, Michael and Molly Carmichael (Cushing & Collins).  While away on business, Peggy is once again accosted by the one armed man and no one believes her.  She also interacts with the creepy headmaster who happens to have an artificial arm that the viewer notices but apparently not Peggy.

"Fear in the Night" is a film that slowly builds tension and mystery and takes place in the empty school and estate and keeps you guessing until the end.