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.

Natalya Bondarchuk
as Hari

Donatas Banionis
as Kris Kelvin

Jüri Järvet
as Dr. Snaut

Vladislav Dvorzhetsky
as Henri Berton

Mykola Hrynko
as Kelvin's Father

Anatoliy Solonitsyn
as Dr. Sartorius

Olga Barnet
as Kelvin's Mother

Vitalik Kerdimun
as Henri Berton's Son

Olga Kizilova
as Guest of Dr. Gibarian

Tatyana Malykh
as Kris Kelvin's Niece
CinemaSerf
Acclaimed psychologist "Kelvin" (Donates Banionis) is despatched to a space station to investigate the mysterious death of one of the three remaining scientists who are working on the surface of a remote moon. Upon arrival he discovers that there are now just the two of the original eighty-plus crew...