'Nanny' review: One of the best horror movies of the year is now streaming

Have you ever awoken in the middle of the night, heart pounding hard from a nightmare? Maybe you tell yourself it's stress, or your comeuppance for snacking too close to bedtime. Or maybe you know better: It's your gut, warning of impending disaster. To watch Nanny is to slip into the spin of that slow-burn terror. 

From its...