Season 12
01. Lassie Meets a Challenge
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02. Sudden Fury
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03. Lassie and the Dynamite
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04. Lassie and the Seagull
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05. Charlie Banana
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06. In the Eyes of Lassie
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07. Trouble at Paradise Lake
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08. Little Dog Lost
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09. 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
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11. Lassie Saves a Life
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12. The Waif
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13. Crisis
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14. Pitfall
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15. Temper the Wind
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16. The Gift of Life
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17. Lassie Catches the Poachers
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18. The Town That Wouldn't Die
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19. Just One Old Cow
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20. The Outcast
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21. Cradle of the Deep
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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
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25. Avalanche
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26. Babes in the Woods
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27. Lassie's Rescue Mission
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28. The Doll
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29. The Untamed Land
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30. The Day the Mountain Shook
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31. The Vigil
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32. The Strongest Instinct
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