Living quietly under the assumed name Paul Sernine, reformed gentleman crook Arsene Lupin is summoned to protect his invalid, wealthy friend Henry Forbes.
| Actor | Role |
|---|---|
 David PowellPaul Sernine (aka Arsene Lupin) | Paul Sernine (aka Arsene Lupin) |
 Marguerite CourtotFlorence Chandler | Florence Chandler |
 Templar SaxeAntoine Jabot | Antoine Jabot |
 Myrtle StedmanMarie Forbes | Marie Forbes |
 Charles K. GerrardGordon Savage | Gordon Savage |
 Joseph HerbertHenry Forbes | Henry Forbes |
| CCharles L. MacDonaldChief Harvey Williams | Chief Harvey Williams |
| RRiley HatchAlexandre Mazeroux | Alexandre Mazeroux |
| FFrederick BurtonDoctor Varney | Doctor Varney |