While in Canada Timmy and Lassie encounter a downed hot air ballonist. By accident they end up in the balloon which takes them into the wilderness. The young boy and his dog must find a way to survive even fending off a wild pig.
as Ruth Martin
as Timmy Martin
as Sergeant Sprague
as Chinook Pete
as John Stanley
as Paul Martin
as Constable MacDonald
as Pilot
as Ranger Henty
