Initially, the discovery of a microscopic, single-celled organism—lovingly nicknamed "Calvin" by school children on Earth—is a cause for global celebration. However, as the crew begins to study Calvin, they realize the organism is rapidly evolving. Every cell in its body is both a muscle and a nerve, making it incredibly intelligent and resilient. When a lab accident occurs, Calvin turns hostile, and the ISS becomes a high-tech deathtrap. Stellar Cast and Performances