The Thirteenth Chair
Conrad NagelRichard Crosby
Leila HyamsHelen 'Nellie' O'Neill
Margaret WycherlyMadame Rosalie La Grange
Helene MillardMary Eastwood
Holmes HerbertSir Roscoe Crosby
Mary ForbesLady Alice Crosby
Béla LugosiInspector Delzante- Charles QuatermaineDr. Philip Mason
- Moon CarrollHelen Trent
Cyril ChadwickBrandon Trent
