Overview: While Duke and his master move on, Lassie remains at the ranch, but her new puppies are endangered by the owner, who thinks the pups were sired by a killer dog.
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First Air Date: Sep 12, 1954Last Air date: Mar 24, 1973Season: 19 SeasonEpisode: 591 EpisodeRuntime: 24 minutesQuality: HDIMDb: 6.13 / 10 by 64 usersPopularity: 75.613Language: English