Who wouldn't love a flick in which Lassie, compelled by burning hatred, tracks down the man who killed his beloved owner? It's not quite as bleak as all that, (if it had taken place in a city, it would have been the sole entry in the "Lassie-noir" genre) but it IS a startlingly dark work, for a 50's family-movie audience. As for the acting, it's pretty much what you would expect...but during those final scenes, where Lassie faces the killer...aren't you glad it's not YOU facing that implacable, growling, fang-faced beast?