| Actor | Role |
|---|---|
 Jean LefebvreMurdoch Cooper | Murdoch Cooper |
 Darry CowlWilliam Wilson | William Wilson |
 Françoise FleuryMonica Johnson | Monica Johnson |
 Jacques BalutinDavid Prosser | David Prosser |
 Claire MaurierCaroline Sinclair | Caroline Sinclair |
 Jacques MarinBernard Lockwood | Bernard Lockwood |
| JJacqueline FinnaertYvonne Wilby | Yvonne Wilby |
| RRolande KalisDorothy Cooper | Dorothy Cooper |
| AAlbert PiletteLe détective | Le détective |
 Annick BergerMme Cooper | Mme Cooper |