Lassie — Season 12
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2. Sudden Fury
3. Lassie and the Dynamite
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
5. Charlie Banana
6. In the Eyes of Lassie
7. Trouble at Paradise Lake
8. Little Dog Lost
9. Lassie's Time of Peril
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
11. Lassie Saves a Life
12. The Waif
13. Crisis
14. Pitfall
15. Temper the Wind
16. The Gift of Life
17. Lassie Catches the Poachers
18. The Town That Wouldn't Die
19. Just One Old Cow
20. The Outcast
21. Cradle of the Deep
22. The Homesick Hound
A bloodhound needs to be relocated, but he dislikes all his new abodes.
23. The Silent Threat
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
25. Avalanche
26. Babes in the Woods
27. Lassie's Rescue Mission
28. The Doll
29. The Untamed Land
30. The Day the Mountain Shook
31. The Vigil