Twisted Nerve (1968)

Martin Durnley is a young man with an infantilizing mother, resentful stepfather and an institutionalized brother with Down’s syndrome. To cope, he retreats into an alternate child personality he calls Georgie. After being caught during a theft attempt at a department store, he befriends a female customer who is sympathetic to him, but his friendship soon turns into obsession.
Roy Boulting
Hayley Mills, Hywel Bennett, Billie Whitelaw, Frank Finlay, Barry Foster, Phyllis Calvert, Salmaan Peerzada, Christian Roberts, Gretchen Franklin, Timothy West, Thorley Walters, Russell Napier, Timothy Bateson, Basil Dignam, Marianne Stone, Richard Davies
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