Nightmare is a 1964 British 'Hammer Film Productions' horror mystery thriller film. It features David Knight, Moira Redmond, Jennie Linden, Brenda Bruce, and George A. Cooper.
The nights of young private-school student Janet are troubled by horrible dreams in which her mother, who is actually locked up in a mental institution, haunts her. When her persistent nightmares get her expelled and sent home, those visions insist on continuing to plague her at home.