Cast
- José Luis Ozores as Fidel
- Antonio Ozores as Raul "Profesor Misterius"
- Diana Lorys as Lucía
- Elisa Montés as Mercedes
- Roberto Camardiel as Leoncio
- Terele Pávez as Camarera
- Mari Luz Real
- Goyo Lebrero as Vicente
- Lola Gaos as Componente del circo
- Belinda Corel as Irasema