A psychologist is sent to a space station orbiting a planet called Solaris to investigate the death of a doctor and the mental problems of cosmonauts on the station. He soon discovers that the water on the planet is a type of brain which brings out repressed memories and obsessions.
| Actor | Role |
|---|---|
 Natalya BondarchukHari | Hari |
 Donatas BanionisKris Kelvin | Kris Kelvin |
 Jüri JärvetDr. Snaut | Dr. Snaut |
 Vladislav DvorzhetskyHenri Berton | Henri Berton |
 Mykola HrynkoKelvin's Father | Kelvin's Father |
 Anatoliy SolonitsynDr. Sartorius | Dr. Sartorius |
 Olga BarnetKelvin's Mother | Kelvin's Mother |
| VVitalik KerdimunHenri Berton's Son | Henri Berton's Son |
| OOlga KizilovaGuest of Dr. Gibarian | Guest of Dr. Gibarian |
| TTatyana MalykhKris Kelvin's Niece | Kris Kelvin's Niece |
 Aleksandr MisharinShanahan, Chairman of the Anri Berton Commission | Shanahan, Chairman of the Anri Berton Commission |
| BBagrat OganesyanProfessor Tarkhe | Professor Tarkhe |
 Tamara OgorodnikovaAnna | Anna |
 Sos SargsyanDr. Gibarian | Dr. Gibarian |
 Yulian SemyonovChairman of the Scientific Conference | Chairman of the Scientific Conference |
| VVitaliy StatsinskiyMember of the Academic Council | Member of the Academic Council |
| VVera SumenovaNot listed | Not listed |
 Georgiy TeykhProf. Messenger | Prof. Messenger |