Fearing that his recently-acquired step-mother, Ann Dennis, is competing with him for his father's affections, and saddened by the death of his dog, young Danny Mitchell seeks consolation in the companionship of a ferocious, Nazi-trained police dog, Rusty, brought to the U.S. by a returning WWII-veteran. The step-mother, with tender understanding, eventually wins Danny over while Danny pacifies his new dog.
Ted Donaldson
as Danny Mitchell
Margaret Lindsay
as Ann Mitchell
Conrad Nagel
as Hugh Mitchell
Gloria Holden
as Louise Hover
Robert B. Williams
as Will Nelson
Addison Richards
as Dr. Banning - Psychiatrist
Arno Frey
as Tausig
Eddie Parker
as Ehrlich
Ace the Wonder Dog
as Rusty
Billy Gray
as Harry (uncredited)
Gary Gray
as Herbie (uncredited)
Lloyd Ingraham
as Minister (uncredited)
