The Assistant is a film that provokes a visceral physical reaction; the churning of the stomach, the gritting of the teeth, the white-knuckle gripping of a seat edge. It has malevolent monsters and horrified victims, and hums with a palpable sense of threat. It is, without doubt, a horror movie. Yet, while writer/director Kitty Green’s sensitively-made yet hard-hitting feature debut plays out in a dark, cold world full of secrets, lies and isolation, hers is no nightmarish fantasy landscape. Instead, she deftly — and devastatingly — lays bare the all-too-familiar fears that come with being made to feel like a voiceless, helpless, insignificant woman in an aggressively male environment.