Elegant, cruel and precise in its commentary on the turmoil inherent in being a teenage girl, the film works brilliantly up until the final act, its mordant, manicured savagery heightened by a primal score... [Thoroughbreds] is an eye-catching calling card for first-time writer-director Cory Finley, and a reminder of how great a loss to cinema was Yelchin’s untimely death.