The Scottish collie Lassie goes to Alaska. There Lassie meets the Indian boy Neeka, who stays in the woods with his stepfather, who is a Ranger. When on behalf of his school Neeka is collecting plants for his herbarium both Neeka and Lassie have a lot of adventures.
| Actor | Role |
|---|---|
 Jed AllanScott Turner (archive footage) | Scott Turner (archive footage) |
 John HarmonClay Bowers (archive footage) | Clay Bowers (archive footage) |
 June LockhartRuth Martin | Ruth Martin |
 Robert RockwellDean Chalmers (archive footage) | Dean Chalmers (archive footage) |
| MMark MirandaNot listed | Not listed |
| HHugh ReillyNot listed | Not listed |
| CCarlo RizzoNot listed | Not listed |
 LassieLassie the Dog | Lassie the Dog |