People of the Revolution and the USSR
- Evgeny Pavlovich Velikhov Евгений Павлович Велихов Soviet physicist who linked fusion science, Chernobyl, and nuclear disarmament
- Valery Alekseyevich Legasov Валерий Алексеевич Легасов The Kurchatov chemist who led science at Chernobyl, then left the full truth on tapes before hanging himself
- Irina Bayanovna Solovyova Ирина Баяновна Соловьёва Tereshkova's backup cosmonaut, the physically strongest candidate Kamanin judged too reserved for the spotlight
- Nikolai Maximovich Fomin Николай Максимович Фомин The chief engineer who refused to believe the reactor was destroyed and kept pumping water into its ruins
- Valentina Vladimirovna Tereshkova Валентина Владимировна Терешкова The textile-worker 'Chaika,' first woman in space
- Aleksandr Fyodorovich Akimov Александр Фёдорович Акимов Soviet nuclear engineer and Unit 4 shift supervisor who directed the response and died of radiation exposure
- Leonid Fedorovych Toptunov Леонид Фёдорович Топтунов The 25-year-old senior reactor control engineer who pressed the AZ-5 button at Chernobyl's Unit 4
- Boris Mikhailov Борис Михайлов The chief designer of the Volga inflatable airlock that made Leonov's spacewalk possible