A London slasher pack the suitcases of his victims before stabbing them to death in this adaptation of Edgar Wallace's 'Secret of the Black Suitcases.'
| Actor | Role |
|---|---|
 Horst TappertCharles Barton | Charles Barton |
| FFred WilliamsInspector Ruppert Redford | Inspector Ruppert Redford |
 Barbara RüttingCelia | Celia |
 Wolfgang KielingFerencz | Ferencz |
 Siegfried SchürenbergDr. Bladmore | Dr. Bladmore |
 Elisa MontésHelen Bennett | Helen Bennett |
 Eva GardenLinda | Linda |
 Luis MorrisAndy Pickwick | Andy Pickwick |
 Mara LasoLizi | Lizi |
 Rainer BasedowMcDowell | McDowell |
 Ángel MenéndezScotland Yard Chef | Scotland Yard Chef |
 Dan van HusenKronstel | Kronstel |
 Andrea MontchalPatakes | Patakes |
 Jesús FrancoGonzales | Gonzales |
 Guillermo MéndezNot listed | Not listed |
 Beni CardosoDiana | Diana |
| KKarl Heinz MannchenGuest in Restaurant (uncredited) | Guest in Restaurant (uncredited) |
 Emilio Martínez Lázaro(Uncredited) | (Uncredited) |
| MMoisés Augusto RochaRoger (uncredited) | Roger (uncredited) |