Chapter 21
Chapter 21 — "Crew Suicide Pacts"
TL;DR: A long flashback reveals the Hail Mary crew's cold-blooded plans for how each of them would die at the end of their one-way mission, while in the present Grace and Rocky watch their first nitrogen-resistance experiments fail.
Summary: The chapter cuts between two emotional registers. In flashback, Grace remembers crew briefings on Earth where the three astronauts — Yáo, Ilyukhina, and Grace — discussed, with chilling clinical calm, exactly how each of them would end their lives once the mission's data was sent home. They had drawn up checklists. They had known they were going to die. In the present, Grace and Rocky run their first attempts to breed Taumoeba populations that can survive in Earth-like and Erid-like nitrogen levels. Every dish dies. Every population. The cost of failure is now real to both of them: not "we don't get the cure home," but "twenty billion people, two civilizations, no second chance."
Key scenes:
- Flashback: a sterile Earth briefing room, Yáo Li-Jie and Olesya Ilyukhina seated at a table with Grace, calmly outlining their planned end-of-mission deaths
- Present: a row of Petri dishes under amber light, all dead, Grace's gloved hand resting on the workbench
- Rocky inside his sphere, posture sagging in alien grief
- A second, harder flashback — the moment Grace personally agreed to a method for his own death
Characters present: Ryland Grace, Rocky, Yáo Li-Jie (flashback, alive), Olesya Ilyukhina (flashback, alive)
Locations / settings:
- A mission-prep briefing room on Earth, sterile and bright (flashback)
- The Hail Mary lab in the present — dim, exhausted, smelling of failed experiments
Visual motifs: three astronauts seated around a table with cold instrument trays in front of them, a row of small dead Petri dishes glowing amber, the flashback rendered in a single warmer color palette set against the present's gold-on-black voice, a list of names on a whiteboard with lines through them
Emotional tone: grim, mortality-soaked, defeated, resolved-to-keep-trying
Confidence: high — the suicide-pact flashback is one of the book's most discussed sequences.