Relatives of a recently deceased man meet at his eerie castle for a reading of the will. They encounter a sinister piano player who turns out to be a toy maker, and his toys are imbued with murderous intentions.
| Actor | Role |
|---|---|
 Boris KarloffMatthias Morteval | Matthias Morteval |
 JulissaLucy Durant | Lucy Durant |
 Andrés GarcíaCharles Beasley | Charles Beasley |
 José Ángel Espinosa 'Ferrusquilla'Dr. Emery Horvath (as Ángel Espinoza) | Dr. Emery Horvath (as Ángel Espinoza) |
| BBeatriz BazCordelia Rash | Cordelia Rash |
 Quintín BulnesIvar Morteval | Ivar Morteval |
| MManuel AlvaradoMorgenstern Morteval | Morgenstern Morteval |
 Arturo FernándezFodor | Fodor |
| CCarmen VelezNot listed | Not listed |
| FFelipe de FloresNot listed | Not listed |
| FFernando SaucedoNot listed | Not listed |
| EEstuardo MoraNot listed | Not listed |
| JJosé Luis G. de LeónNot listed | Not listed |
| VVictor JordanNot listed | Not listed |
 José Antônio GarciaNot listed | Not listed |