Season 12 Episodes
1. Lassie Meets a Challenge
September 12th, 1965
2. Sudden Fury
September 19th, 1965
3. Lassie and the Dynamite
September 26th, 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.
4. Lassie and the Seagull
October 3rd, 1965
5. Charlie Banana
October 10th, 1965
6. In the Eyes of Lassie
October 17th, 1965
7. Trouble at Paradise Lake
October 24th, 1965
8. Little Dog Lost
October 31st, 1965
9. Lassie's Time of Peril
November 7th, 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.
10. In the Midst of Splendor
November 14th, 1965
11. Lassie Saves a Life
November 21st, 1965
12. The Waif
November 28th, 1965
13. Crisis
December 5th, 1965
14. Pitfall
December 12th, 1965
15. Temper the Wind
December 19th, 1965
16. The Gift of Life
December 26th, 1965
17. Lassie Catches the Poachers
January 2nd, 1966
18. The Town That Wouldn't Die
January 16th, 1966
19. Just One Old Cow
January 23rd, 1966
20. The Outcast
January 30th, 1966
21. Cradle of the Deep
February 6th, 1966
22. The Homesick Hound
February 13th, 1966
A bloodhound needs to be relocated, but he dislikes all his new abodes.
23. The Silent Threat
February 20th, 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.
24. The Friendless
February 27th, 1966
25. Avalanche
March 6th, 1966
26. Babes in the Woods
March 13th, 1966
27. Lassie's Rescue Mission
March 20th, 1966
28. The Doll
March 27th, 1966
29. The Untamed Land
April 3rd, 1966
30. The Day the Mountain Shook
April 17th, 1966
31. The Vigil
April 24th, 1966
32. The Strongest Instinct
May 1st, 1966
