Kristy McNichol portrays Julie Sawyer, a kind-hearted young woman who adopts the white dog and tries to rehabilitate him.
Paul Winfield plays Keys, an animal trainer who attempts to retrain the white dog to overcome its racist conditioning.
Burl Ives is Carruthers, the owner of the dog training facility where the white dog was initially taught to attack black people.
Jameson Parker portrays Roland Grale, a film star who becomes involved in Julie's mission to rehabilitate the white dog.
Christa Lang appears as Nurse, a character who provides support and care for Julie as she deals with the challenges of rehabilitating the white dog.
Vernon Weddle plays Vet, a veterinarian who advises Julie on the proper care and training of the white dog.
Karl Lewis Miller is the Attacker, a man who plays a key role in demonstrating the white dog's dangerous conditioning.
Karrie Emerson portrays Sun Bather, a character who encounters the white dog in a shocking and pivotal scene.
Helen Siff appears as the Pound Operator, a staff member at the animal control facility where the white dog is taken after attacking a black man.
Glen Garner plays Pound Worker, a character who handles the care and maintenance of the dogs at the animal control facility.
Terrence Beasor portrays Pound Driver, the person responsible for transporting the captured dogs to the pound.
Tony Brubaker is Sweeper Driver, a character involved in an intense chase scene with the white dog towards the end of the film.
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