Humanity picks a fight it can't afford to lose in Cosmic Sin, a 2021 science-fiction action film built around a desperate strike against an alien threat.
What is Cosmic Sin about?
Seven soldiers, veterans of a fractured future where humanity has expanded across the stars, learn that first contact with another civilization has gone wrong. Rather than wait for a war to reach Earth's colonies, the group launches a preemptive assault meant to end the conflict before it can properly begin. The mission puts them face to face with an unknown enemy and with the cost of striking first, as they push into hostile territory with no guarantee the gamble will pay off.
About the cast
Bruce Willis leads the ensemble alongside Frank Grillo and Adelaide Kane, with Lochlyn Munro, Costas Mandylor, Johnny Messner, Eva De Dominici and Brandon Thomas Lee filling out the unit. The cast plays soldiers shaped by years of conflict, bringing a hardened, no-nonsense energy to a story that moves fast and gives its characters little time to second-guess the mission.
Context & significance
Cosmic Sin sits in a run of lean, effects-driven science-fiction actioners built around small squads facing outsized threats, a format that favors momentum over exposition. Its premise, a preemptive strike meant to head off an interstellar war, gives the action a ticking-clock urgency rather than a slow-burn first-contact mystery. Genre fans drawn to military science fiction will recognize the shorthand: a tight unit, a hostile unknown and a mission with civilization-level stakes. The film's compact runtime keeps that shorthand from overstaying itself, moving from briefing to confrontation without much room for subplots.
Watching Cosmic Sin on Ktime
Cosmic Sin streams on K-Time with Persian dubbing and Persian subtitles, giving viewers the option to watch in the language that suits them best. This page is free to read, and watching the film itself only requires logging into a K-Time account. The platform's Farsi-first design makes genre titles like this one easy to find for Persian-speaking audiences everywhere.