Good evidence that a horror movie doesn't need to be especially original in order to be effective, "Saint Maud" takes the old-hat concept of psychological disturbance meeting religious zeal and does something memorable and distinctive with it. Anchored by Morfydd Clark's fussy performance (given two years before Thomasin McKenzie did something similar in the masterful "Last Night in Soho"), this is a movie that treads no new ground but retains interest with its steady tension and neat visual touches. At moments it even reminded me of "The Blackcoat's Daughter", which, if you know me, is a very good sign. Of course, "Saint Maud" never quite reaches the heights that it might have under the direction of an Oz Perkins or Edgar Wright, but it's a solid shot of the familiar.