A young man invents a robot dog that has super strength, x-ray vision and can detect crimes being committed. A greedy businessman tries to steal the boy's invention from him.

Wesley Eure
as Brian Foster

Valerie Bertinelli
as Casey Norton

Conrad Bain
as Ralph Norton

Red Buttons
as Bracken

Jim Backus
as Mr. Gibbs

Chuck McCann
as Brooks

Larry Bishop
as Ken Sharp

Hermione Baddeley
as Mrs. Flower

Robert Q. Lewis
as Merkle

Austin Willis
as Head Engineer