Clearly designed as a studio knock-off with the intent of ‘raising-the-bar’ on the horror of both The Exorcist and Rosemary’s Baby, with Death Wish helmer Micheal Winner bringing a puerile trash-factor to the proceedings, The Sentinel is not lacking in crazy moments. From being over-cast to the point of ludicrousness (characters played by Jeff Goldblum, Christopher Walken, Jose Ferrer, Eli Wallach, and Jerry Orbach add very little to the story considering their star power), to dress-up parties for cats, to graphic onscreen masturbation, to using bonafide disfigured people to represent the minions of satan. The film has it all if you are looking for an exploitive bit of insensitivity to just about, well, everyone.
Allison Parker (Cristina Raines), a young fashion model looking for her own apartment in New York City, stumbles across the best deal in town, an spacious, fully furnished brownstone in Brooklyn with a wicked view. A gracefully aging Ava Gardner is her realtor in a small role.
In short order, Allison discovers the place has some of the craziest inhabitants in the city, including a ghoulish priest that does nothing but stare out the window, some crazy ballerinas and a chatty old fellow (Burgess Meredith, fantastic) who is never seen without a bird on his shoulder, and a pussy cat in his arms. These downsides she discovers over the course of a punishing several weeks culminate in an increasing series of feinting spells, flashbacks to her suicidal teenage years, and hallucinations of naked old men wandering into her bedroom. As they pile up, her lawyer boyfriend (Chris Sarandon) not only seems useless at helping her cope, but might even be in league with all of the crazy people. Everyone in her current state of reality seems hell-bent (literally) on terrorizing her, except a younger priest (John Carradine) who looks over the elderly priest in the attic, and has some longterm plans for Alison.
The Sentinel culminates in a whopper of a climax, that is as nutty as anything ever put on film in the 1970s, and that is saying something. In other words, the film is never boring.
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