A doctor researched the duplication of personality , and found in the person of René de Varennes, who had attempted suicide, a subject of study.
| Actor | Role |
|---|---|
| JJean LoretteRené de Varennes | René de Varennes |
 Henri MaillardDocteur Johannès | Docteur Johannès |
 Simone VaudryJanine | Janine |
| TTania DaleymeComtesse Sâti | Comtesse Sâti |
| LLouis DoryClaude | Claude |
 Fabien HazizaNot listed | Not listed |