The Open Door (1966)
Colonel Mortimer returns to his family after a long spell in India to find his young son in bed ill, and tormented by a wailing voice... but is it in the boy's imagination or not?
Top billed cast
Jack HawkinsColonel Mortimer
Rachel GurneyMrs. Mortimer
Mark DignamDr. Simson
John LaurieMr. Moncrieff- Henry BeltranRoland Mortimer
Jill Mai MeredithJeanie Mortimer
Geoffrey SumnerCharles
Derek TansleyCorporal Jones
Molly WeirMrs. Jarvis- Edmund SulleyMr. Jarvis