 | Donatas Banionis als Kris Kelvin |
 | Natalya Bondarchuk als Hari |
 | Jüri Järvet als Dr. Snaut |
 | Anatoliy Solonitsyn als Dr. Sartorius |
 | Nikolay Grinko als Kelvin's Father |
 | Vladislav Dvorzhetsky als Henri Berton |
 | Georgiy Teykh als Prof. Messenger |
 | Sos Sargsyan als Dr. Gibarian |
 | Olga Barnet als Kelvin's Mother |
 | Tamara Ogorodnikova als Anna |
| Andrei Tarkovsky | Director |
| Andrei Tarkovsky | Screenplay |
| Viacheslav Tarasov | Producer |
| Vyacheslav Ovchinnikov | Original Music Composer |
| Vadim Yusov | Director of Photography |
| Lyudmila Feiginova | Editor |
| Nina Marcus | Editor |
| Mikhail Romadin | Production Design |
| Nelli Fomina | Costume Design |
| Stanisław Lem | Novel |
| Evgeniy Shvedov | Camera Operator |
| Fridrikh Gorenshteyn | Screenplay |
| N. Boyarova | Script Editor |
| L. Lazarev | Script Editor |
| E. Paramanov | Lighting Technician |
| A. Klimenko | Special Effects |
| S. Gavrilov | Set Decoration |
| V. Prokofev | Set Decoration |
| Vera Rudina | Makeup Artist |
| Semyon Litvinov | Sound Designer |
| Eduard Artemyev | Original Music Composer |
| Paolo Rocco Innamorato | First Assistant Art Direction |
| Larisa Tarkovskaya | Assistant Director |
