After a storm strands Lassie in a lake during a camping trip, she is left behind by her owners until she is rescued by a forest ranger. During her recovery, Lassie bonds with her rescuer and eventually joins him to track down an inexperienced hunter whose reckless poaching has inadvertently sparked a forest fire.
| Actor | Role |
|---|---|
 LassieLassie the Dog | Lassie the Dog |
 Robert BrayCorey Stuart | Corey Stuart |
 June LockhartRuth Martin | Ruth Martin |
 Jon ProvostTimmy Martin | Timmy Martin |
 Andy ClydeCully Wilson | Cully Wilson |