Mark Duplass as Billy and Sterling K. Brown as Ray sit next to each other on a couch in Biosphere. Image via IFC Films Editor’s Note: The following contains spoilers for Biosphere. Biosphere is a ...

A bright green light in the sky appears to slowly move closer. Down on Earth, Billy and Ray, a pair of childhood friends played by Mark Duplass and Sterling K. Brown, look up and wonder what it means.

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