Season 12

1. Lassie Meets a Challenge

1965-09-12

2. Sudden Fury

1965-09-19

3. Lassie and the Dynamite

1965-09-26

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

1965-10-03

5. Charlie Banana

1965-10-10

6. In the Eyes of Lassie

1965-10-17

7. Trouble at Paradise Lake

1965-10-24

8. Little Dog Lost

1965-10-31

9. Lassie's Time of Peril

1965-11-07

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

1965-11-14

11. Lassie Saves a Life

1965-11-21

12. The Waif

1965-11-28

13. Crisis

1965-12-05

14. Pitfall

1965-12-12

15. Temper the Wind

1965-12-19

16. The Gift of Life

1965-12-26

17. Lassie Catches the Poachers

1966-01-02

18. The Town That Wouldn't Die

1966-01-16

19. Just One Old Cow

1966-01-23

20. The Outcast

1966-01-30

21. Cradle of the Deep

1966-02-06

22. The Homesick Hound

1966-02-13

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

23. The Silent Threat

1966-02-20

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

1966-02-27

25. Avalanche

1966-03-06

26. Babes in the Woods

1966-03-13

27. Lassie's Rescue Mission

1966-03-20

28. The Doll

1966-03-27

29. The Untamed Land

1966-04-03

30. The Day the Mountain Shook

1966-04-17

31. The Vigil

1966-04-24

32. The Strongest Instinct

1966-05-01