Bad Sister (2015)

Bad Sister knows exactly what it is: a lean, pulpy thriller that turns the supposedly safest place—a Catholic boarding school—into a pressure cooker of suspicion and dread. Director Doug Campbell keeps the pace brisk and the tension tight, letting Zoe’s growing unease ripple through hushed hallways and polite smiles that don’t quite reach the eyes, while the “nun” at the center of it all brings a deliciously unsettling edge. The fun here is watching the façade crack in real time, with solid TV-movie performances that sell the paranoia and the escalating stakes without winking at the camera. If you enjoy twisty, made-for-TV thrillers with a wicked premise and a steady build, this one is an easy, entertaining watch—though viewers looking for subtlety over melodrama may find it a bit heightened by design.

Bad Sister wants to be a twisty, pulpy “danger behind holy walls” thriller, with an impostor nun and a teen heroine racing to expose the truth before her family gets hurt. The problem is it plays more like a made-for-TV cautionary tale than a genuinely suspenseful mystery, leaning on familiar Lifetime-style beats, convenient reveals, and tension that’s more talky than nerve-racking. Performances are serviceable and the setup is enjoyably trashy if you like your thrillers simple and fast, but don’t expect subtle character work, realistic school dynamics, or surprises you won’t see coming. If you’re after a slick, psychologically rich thriller, this likely isn’t your stop; if you just want an easy, slightly campy evening watch, it does the job.