The Omen (1976)
somniloquist 2 points 4 years ago. (Contains Spoilers)

The original “evil child” movie, the Omen is required viewing in the horror genre. Not reliant on cheesy makeup, glowing eyes, or overwrought effects, the Omen saves everything for just the right time.
And just as the sneaking suspicion about a 5 year old child would, everything can be read two ways. Maybe he’s evil. Maybe you’re going crazy. Maybe that nanny is here for nefarious reasons, and maybe the agency really did send her. And where does that dog keep coming from anyway?
But the grey areas only last until it’s too late. The fog clears and we’re all screwed.