Three astronauts leave Earth for Mars in Stowaway; a fourth person wakes up partway there, and none of the math for the mission accounted for a fourth mouth to feed or a fourth set of lungs to keep breathing.
What is Stowaway about?
The crew is barely underway when they discover an unplanned passenger tangled in the ship's systems, injured and disoriented, having ended up aboard through nobody's fault. There was never a seat, a ration allotment, or a spare supply of the one resource the ship cannot make more of, and every day the crew spends puzzling over what to do is a day closer to a shortage that will not announce itself gently. The film sits with that arithmetic rather than rushing past it: engineers, doctors, and a passenger who did nothing wrong are left weighing a decision that has no version anyone wants to make. It plays out less as an action thriller than as a pressurized character study, where competence and compassion keep colliding with numbers that refuse to move.
About the cast
Anna Kendrick and Toni Collette anchor the crew as two of the mission's core astronauts, with Daniel Dae Kim as their fellow crew member. Shamier Anderson plays the stowaway whose accidental presence reshapes every decision left to make aboard the ship, and the film keeps its cast deliberately small, letting the four performers carry nearly every scene between them.
Context & significance
Stowaway is a 2021 German-American production that blends drama, science fiction, and thriller into a single close-quarters story, set almost entirely within the confines of a Mars-bound spacecraft. Director Joe Penna favors a grounded, procedural approach over spectacle, treating the mission's engineering and life-support constraints as the real source of tension rather than any external threat.
Watching Stowaway on Ktime
Stowaway is available to watch on K-Time with a free account login, part of a paid subscription with no separate purchase required. The film carries both Persian dubbing and Persian subtitles, letting Farsi-speaking viewers follow every technical exchange in their own language, in keeping with K-Time's Farsi-first approach for its diaspora audience.