Lassie and Timmy face a struggle for survival when they end up sailing wildly through the air as the County Fair's prized hot-air balloon becomes unfastened by a windstorm! They are in for the ride of their lives as they are swept across the Canadian wilderness into uncharted backcountry. June Lockhart (from Lost in Space) and Hugh Reilly co-star as Timmy's parents, Ruth and Paul Martin.
