A high-concept riff on “12 Angry Men” that balances on a knife’s edge between taut, ingeniously scripted courtroom drama and schlocky, off-brand B-movie. It’s easy to see how Warner Bros mistook this for a straight-to-video feature; it looks and feels cheap, both in its extremely basic sets and its patently ridiculous central premise. Still, Jonathan Abrams’s script is more than competent, if not by much. What it lacks in brains and nuance for jurisprudence it makes up for in its impeccable structure and pacing. The whole thing is extremely watchable, particularly the solid performances from Nicholas Hoult and the relentlessly engaging Toni Collette. But this movie also won’t leave you feeling any smarter about any of the themes it touches on.