Director Joe Penna – who also co-wrote the script with Ryan Morrison – certainly asks a lot of his cast and they deliver. With just the four of them on-screen for
Stowaway's duration, Anna Kendrick, Daniel Dae Kim, Toni Collette and Shamier Anderson all do excellent work in grounding the heightened premise.
Anderson, in particular, feels authentic in his reaction to the situation he finds himself in, while you feel every weight of the terrible decision weighing on Collette's character Marina, as the commander of the ship.
Kendrick and Kim are mostly there to be the angel and demon, respectively, on her shoulder, offering different viewpoints for the situation. However, they're experienced enough to flesh out the roles and ensure that you're never totally for or against either of them.