Shadows on the Stairs is a slimmed-down adaptation of Frank Vosper's stage play Murder on the 2nd Floor. There's dirty work afoot at the London boarding house managed by Mr. and Mrs. Armitage (Miles Mander, Frieda Inescourt): several mysterious murders have occured, and everyone is under suspicion. One of the tenants is Mr. Bromilow (Bruce Lester), who weaves in and out of the proceedings with the all-knowing air of one who's already figured out the solution to the murders. Indeed, Bromilow has done just that, as demonstrated by a twist ending that would have done Alfred Hitchcock or Rod Serling proud. Otherwise, Shadows on the Stairs is standard stuff, standardly produced.