Stewart is completely believable as a take-charge anti-hero. She’s photogenic and interacts well with the rest of the cast, particularly Athie, Henwick and Cassel. It’s a surprisingly natural warrior performance, making her a good candidate for a superhero movie. Henwick takes Emily through the film’s most dramatic character arc, showing fear and determination in the right places. Cassel, as the alpha who shares ground with Norah, mixes testosterone with sensitivity perfectly. While John Gallagher Jr. (10 Cloverfield Lane) adds a much-needed dose of humor.