Three thieves rip off a shipment of used money being sent back to the US. As they are escaping the robbery (after having taken a hostage), they wind up on an island in a hotel with an apparently crazed manager and a building full of demented residents.
| Actor | Role |
|---|---|
 Jayne MansfieldDarlene / Mrs. Smithopolis | Darlene / Mrs. Smithopolis |
 Cameron MitchellLylle Corbett | Lylle Corbett |
 Dodie HeathSandra Morelli | Sandra Morelli |
 Ivor SalterDolph Kostis / Mr. Smithopolis | Dolph Kostis / Mr. Smithopolis |
 Isa MirandaMadame Benoit | Madame Benoit |
 Werner PetersJannis, Xenia's Butler | Jannis, Xenia's Butler |
 Elisabeth FlickenschildtLady Xenia | Lady Xenia |
 Pinkas BraunLivio Morelli | Livio Morelli |