Professor Preobrazhensky puts courageous experiences, trying to turn a dog in equal to in all of the person. As a result somebody turns out Doggies. Unfortunately, experience proves that it is better for dog to remain a dog.
| Actor | Role |
|---|---|
 Max von SydowProfessor Filipp Filippovich Preobrazenski | Professor Filipp Filippovich Preobrazenski |
 Eleonora GiorgiZina | Zina |
 Mario AdorfBormenthàl | Bormenthàl |
 Gina RovereDar'ja | Dar'ja |
 Cochi PonzoniPoligràph Poligràphovic | Poligràph Poligràphovic |
 Vadim GlownaSchwonder | Schwonder |
 Rena NiehausZoja | Zoja |
 Enzo RobuttiIl commissario | Il commissario |
| VVioletta ChiariniVjazemskaja | Vjazemskaja |
 Amerigo TotIl portiere | Il portiere |
| AAdolfo Lastrettigiudice | giudice |
| VVlado StegarNot listed | Not listed |
 Ilona StallerNatasa | Natasa |
| GGiuliano PetrelliSarovkjam | Sarovkjam |
 Jean-Claude VernèNot listed | Not listed |
 Pietro TordiNot listed | Not listed |
 Augusta Di VincenziCircus spectator (uncredited) | Circus spectator (uncredited) |
| HHoward Nelson RubienNot listed | Not listed |
| MMaria Pia AttanasioNot listed | Not listed |
 Gennaro OmbraNot listed | Not listed |
 Franco MazzieriNot listed | Not listed |
 Neil HansenNot listed | Not listed |
 Attilio DottesioNot listed | Not listed |
 Alessandro TedeschiNot listed | Not listed |