Aired: 9/12/1965
Aired: 9/19/1965
Aired: 9/26/1965
Aired: 10/3/1965
Aired: 10/10/1965
Aired: 10/17/1965
Aired: 10/24/1965
Aired: 10/31/1965
Aired: 11/7/1965
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.
Aired: 11/14/1965
Aired: 11/21/1965
Aired: 11/28/1965
Aired: 12/5/1965
Aired: 12/12/1965
Aired: 12/19/1965
Aired: 12/26/1965
Aired: 1/2/1966
Aired: 1/16/1966
Aired: 1/23/1966
Aired: 1/30/1966
Aired: 2/6/1966
Aired: 2/13/1966
A bloodhound needs to be relocated, but he dislikes all his new abodes.
Aired: 2/20/1966
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.
Aired: 2/27/1966
Aired: 3/6/1966
Aired: 3/13/1966
Aired: 3/20/1966
Aired: 3/27/1966
Aired: 4/3/1966
Aired: 4/17/1966
Aired: 4/24/1966
Aired: 5/1/1966