32 episodesFirst aired 12 September 1965
E1Sept 1965
E2Sept 1965
E3Sept 1965
In an area being developed for swimming and fishing, two youngsters playing hooky wander into the blasting zone. Lassie is able to bring help and rescue the boys.
E4Oct 1965
E5Oct 1965
E6Oct 1965
E7Oct 1965
E8Oct 1965
E9Nov 1965
A flooded river threatens to sweep away a bridge construction project. Ranger Corey Stuart and Lassie brave the raging waters in a small boat to construct a log chain barrier and control the flow of water and logs.
E10Nov 1965
E11Nov 1965
E12Nov 1965
E13Dec 1965
E14Dec 1965
E15Dec 1965
E16Dec 1965
E17Jan 1966
E18Jan 1966
E19Jan 1966
E20Jan 1966
E21Feb 1966
E22Feb 1966
A bloodhound needs to be relocated, but he dislikes all his new abodes.
E23Feb 1966
Corey and another ranger battle a spruce bud worm infestation by spraying but meet resistance from a horse ranch owner. Lassie makes friends with a colt and reveals the true cause of death of one of the horses.
E24Feb 1966
E25Mar 1966
E26Mar 1966
E27Mar 1966
E28Mar 1966
E29Apr 1966
E30Apr 1966
E31Apr 1966
E32May 1966