Son of Lassie is a 1945 Technicolor feature film produced by MGM based on characters created by Eric Knight, and starring Peter Lawford, Donald Crisp, June Lockhart and Pal (credited as Lassie). A sequel to Lassie Come Home, the film focuses on the now adult Joe Carraclough after he joins the Royal Air Force during the World War II and is shot down over Nazi-occupied Norway along with stowaway, Lassie's son "Laddie" – played by Pal. It was released theatrically on April 20, 1945, by Loew's.
In Yorkshire, England, at the estate of the Duke of Rudling (Nigel Bruce), the British Army converted the grounds into a training camp for war dogs. The camp is placed under the supervision of Sam Carraclough (Donald Crisp), the kennel caretaker, who immediately begins the process of selecting the best dogs for training, including Laddie, the young pup of the champion collie, Lassie. Joe Carraclough (Peter Lawford), now an adult, joins the Royal Air Force (RAF) during the Second World War. Departing for training school, he is forced to leave behind his dog Lassie and her pup, Laddie.