Reformed jewel thief the Lone Wolf investigates the murder of a playboy who was blackmailing three socialites.
| Actor | Role |
|---|---|
 Warren WilliamMichael Lanyard / The Lone Wolf | Michael Lanyard / The Lone Wolf |
 Marguerite ChapmanEve Andrews | Eve Andrews |
 Eric BloreJamison | Jamison |
 Mona BarrieJane Merrick | Jane Merrick |
 Tala BirellSonia Budenny | Sonia Budenny |
 Margaret HayesPatricia Blake (Shaw) | Patricia Blake (Shaw) |
 Ann SavageVivian | Vivian |
 Thurston HallInspector Crane | Inspector Crane |
 Warren AsheSidney Shannon | Sidney Shannon |
 Fred KelseyDetective Dickens | Detective Dickens |
 Gerald MohrHarry Cooper | Harry Cooper |
 Louis Jean HeydtArthur | Arthur |
 Frank SullyHertzog - Henchman | Hertzog - Henchman |
 Eddie MarrMac, Henchman | Mac, Henchman |
 Roger ClarkJohn Sheldon II | John Sheldon II |
 Gregory GayeDr. Eric Budenny (as Gregory Gay) | Dr. Eric Budenny (as Gregory Gay) |
 Nina ValeCoatroom Girl (uncredited) | Coatroom Girl (uncredited) |
 Lloyd BridgesAirline Gate Attendant (uncredited) | Airline Gate Attendant (uncredited) |