Андрей Мягков
— Anton Dmitrievich Tikhomirov (young scientist)
Анатолий Папанов
— Igor Mazin (investigator)
Ирина Мирошниченко
— Inna Krotova (former lover)
Владимир Зельдин
— Diaghilev (professor and supervisor of Anton Tikhomirov)
Жанна Прохоренко
— Irina Tikhomirova (ex-wife)
Альберт Филозов
— Ilya Rozhdestvensky (childhood friend and colleague)
Ирина Резникова
— Svetlana Meshkova (fiancee of Anton Tikhomirov)