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.
June Lockhart
as Ruth Martin
Jon Provost
as Timmy Martin
Bob Howard
as Sergeant Sprague
Richard Kiel
as Chinook Pete
Walter Stocker
as John Stanley
Hugh Reilly
as Paul Martin
Will J. White
as Constable MacDonald
Patrick Waltz
as Pilot
Leo Needham
as Ranger Henty
Dick Simmons
as
Patrick Westwood
as
