Dr. Krill, an alien trauma surgeon, learns about the unique and astonishing characteristics of the human brain and its need for sleep. Initially terrified by the sight of the crew appearing dead during their sleep cycles, Krill discovers that sleep is crucial for human survival and cognitive function. Through his observations, he finds that humans have a remarkable ability to recover from brain damage due to their brain's regenerative capabilities. He learns that humans draw strength and vitality from their nightly "dance with death," embracing the process as a necessary and life-sustaining ritual. This revelation highlights the profound resilience and adaptability of humans, further deepening Krill's understanding of their species.