The Holts and their friends search for the runaway Kerry but he is with Lassie and her pups. After a dangerous encounter with a mountain lion Kerry is found. Lassie leaves one of her offspring before continuing her journey.
| Actor | Role |
|---|---|
 Robert FoulkSheriff H. Miller (archive footage) | Sheriff H. Miller (archive footage) |
 Jack BannonJohn Holt (archive footage) | John Holt (archive footage) |
 Skip HomeierJim Pearson (archive footage) | Jim Pearson (archive footage) |
 LassieLassie the Dog (archive footage) | Lassie the Dog (archive footage) |