This is the one where Lassie plays a war veteran with amnesia. Actually Lassie isn't even Lassie, but a male collie named Bill (at least he isn't asked to appear "in drag" like all the other cinematic Lassies). Raised from a pup by adolescent Elizabeth Taylor, the doggy hero becomes a sheep collie on rancher Frank Morgan's spread. Lassie--er, Bill--loses his memory when hit by a car. Later on, the dog finds himself in the K-9 corps, where he is trained to kill Japs (Lassie a racist? No, no, not that!) The dog returns home shell-shocked and ready to tear apart anyone who crosses his path. But the love of Elizabeth Taylor conquers all in the lachrymose Technicolor finale.
by Hal Erickson synopsis