Sergei, a constructor creates a robot, Robert, as his own copy. Tanya teaches Robert to feel and the robot becomes more human than his rationalistic creator.
| Actor | Role |
|---|---|
 Oleg StrizhenovRobert / Sergei | Robert / Sergei |
 Marianna VertinskayaTanya | Tanya |
 Mikhail PugovkinKnopkin | Knopkin |
 Yuriy TolubeevInspector | Inspector |
 Pantelejmon KrymovNot listed | Not listed |
 Marcel MarceauNot listed | Not listed |
| AAleksey DranitsynNot listed | Not listed |
 Igor EfimovNot listed | Not listed |