Michael Conrad, owner of a group of strange animals, trains his beasts to obey him, unleashing them on anyone who stands in his way. His wife and mute assistant begin to suspect that they too are becoming part of the black zoo.
| Actor | Role |
|---|---|
 Michael GoughMichael Conrad | Michael Conrad |
 Jeanne CooperEdna Conrad | Edna Conrad |
 Rod LaurenCarl | Carl |
 Virginia GreyJenny Brooks | Jenny Brooks |
| JJerome CowanJerry Stengel | Jerry Stengel |
 Elisha Cook Jr.Joe | Joe |
 Edward PlattChief Rivers | Chief Rivers |
 Douglas HendersonLt. Mel Duggan | Lt. Mel Duggan |
 Marianna HillAudrey | Audrey |
 Byron MorrowCoroner | Coroner |
| OOren CurtisRadu | Radu |
 Jerry DouglasPerkins - Lab Technician | Perkins - Lab Technician |
 Joseph MellFrank Cramer | Frank Cramer |
| EEric StoneGroom | Groom |
 Eilene JanssenBride | Bride |
 Warrene OttMary Hogan | Mary Hogan |
 ZambaLion | Lion |