Season 11

Lassie finds a mischievous chimpanzee named Debbie and takes her to the ranger station where she ruins the newly-cleaned station and creates havoc outside. Lassie gets some help from a raven before the big inspection.

Dusty, a lead pack mule, is being retired but he doesn't want retirement. Instead, he breaks away and follows his pack team with Lassie close behind him. His persistence convinces his human to let him continue packing.