William McClure is the villlage doctor in a remote Scottish glen. Tricked into buying Lassie, a collie afraid of water, he sets about teaching her to swim. At the same time he has the bigger problem that he is getting older and must ensure the glen will have a new local doctor ready.

• Metro-Goldwyn-Mayer
• Loew's Incorporated
• Edmund Gwenn
• Donald Crisp
• Tom Drake
• Janet Leigh
• Rhys Williams
• Alan Napier
• Reginald Owen
• Edmund Breon