Emlyn Williams' theatrical horror piece Night Must Fall was filmed by MGM without the usual studio-imposed happy ending.
Robert Montgomery stars as Danny, a wickedly charming Irish bellhop who wins the confidence of an elderly invalid (
Dame May Whitty). The old woman's niece (
Rosalind Russell) is not so easily swayed by Danny's blarney, but she finds him strangely attractive, especially when he exhibits a streak of viciousness. Even when the possibility arises that Danny is a wanted murderer, Rosalind is hesitant to call the police. The film's final scene, in which Danny ambles around the house carrying a hatbox that may or may not contain Ms. Whitty's head, is unforgettable.
Robert Montgomery fought long and hard with MGM for the right to play the murderous Danny; the studio heads finally gave in, hoping that the actor would fall on his face and cease to bother him. That Night Must Fall was a success is evidenced by the willingness of MGM to remake the property in 1964; the resultant film was a gore-encrusted opus that had not one tenth of the original's quality. ~ Hal Erickson, All Movie Guide