12x1 - Lassie Meets a Challenge

September 12, 1965

12x2 - Sudden Fury

September 19, 1965

12x3 - Lassie and the Dynamite

September 26, 1965

12x4 - Lassie and the Seagull

October 3, 1965

12x5 - Charlie Banana

October 10, 1965

12x6 - In the Eyes of Lassie

October 17, 1965

12x7 - Trouble at Paradise Lake

October 24, 1965

12x8 - Little Dog Lost

October 31, 1965

12x9 - Lassie's Time of Peril

November 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.

12x10 - In the Midst of Splendor

November 14, 1965

12x11 - Lassie Saves a Life

November 21, 1965

12x12 - The Waif

November 28, 1965

12x13 - Crisis

December 5, 1965

12x14 - Pitfall

December 12, 1965

12x15 - Temper the Wind

December 19, 1965

12x16 - The Gift of Life

December 26, 1965

12x17 - Lassie Catches the Poachers

January 2, 1966

12x18 - The Town That Wouldn't Die

January 16, 1966

12x19 - Just One Old Cow

January 23, 1966

12x20 - The Outcast

January 30, 1966

12x21 - Cradle of the Deep

February 6, 1966

12x22 - The Homesick Hound

February 13, 1966

A bloodhound needs to be relocated, but he dislikes all his new abodes.

12x23 - The Silent Threat

February 20, 1966

12x24 - The Friendless

February 27, 1966

12x25 - Avalanche

March 6, 1966

12x26 - Babes in the Woods

March 13, 1966

12x27 - Lassie's Rescue Mission

March 20, 1966

12x29 - The Untamed Land

April 3, 1966

12x30 - The Day the Mountain Shook

April 17, 1966

12x31 - The Vigil

April 24, 1966

12x32 - The Strongest Instinct

May 1, 1966