
She and the crew realize that Calvin will re-enter the station if they let her in, so she chooses to stay outside, and drowns in her spacesuit.Ĭalvin attempts to re-enter the station through its maneuvering thrusters. As her suit fills with coolant, Golovkina makes her way to the airlock. Calvin attacks Golovkina and ruptures her spacesuit's coolant system. ISS commander Ekaterina Golovkina performs a spacewalk to find and fix the problem, which turns out to be Calvin. The crew attempts to inform Earth of the situation, but the station's communication system overheats, cutting off contact with Earth.

After several minutes, Calvin emerges from Adams' mouth, larger than before, and escapes the lab through a fire-control vent. After Rory unsuccessfully attempts to fight off Calvin, Calvin enters his mouth, devouring his internal organs and killing him. Engineer Rory Adams rescues Derry, but Calvin grabs onto his leg, prompting physician David Jordan to lock Adams in the lab. Calvin then escapes its enclosure and it devours a lab rat, growing in size. Exobiologist Hugh Derry revives a dormant cell from the sample, which quickly grows into a multi-celled organism that American schoolchildren name "Calvin." Derry realizes that Calvin's cells can change their specialization, acting as muscle, neuron, and photosensory cells all at once.ĭuring an experiment by Derry, Calvin suddenly becomes hostile, wrapping itself around Derry's hand and crushing it. The probe is intercepted by the International Space Station, whose six-member crew retrieves its samples.

In the near future, an unmanned space probe returns from Mars to Earth orbit with soil samples potentially containing evidence of extraterrestrial life.
