Lassie - Episode

Timmy and Boomer meet a tough runaway who is so enthusastic about living on his own camping out in the wild that Timmy and Boomer decide to try "roughing it" as well ... with a night camping in the barn.
TRIVIA: This episode, the second to the last of Season 5, was also a shake-out episode for at least two of the regulars in the series: Uncle Petrie, and Boomer. The character "Uncle Petrie" is only mentioned (he's in town apparently) in this episode, and doesn't appear in the next episode at all - rather unusual for a full season contract actor to suddenly disappear just before the end of the season. By all accounts Uncle Petrie was fairly popular with the audience, but Season 6 no longer has his character, or any mention of him except for once in the mid-season episode "In Case of Emergency" where the audience finds out he has moved and started his own business in town. His chactacter is then dropped completely after that episode.
This is also the second to the last episode for the character "Boomer". He will appear in the final episode, but is dropped - without explanation - in Season 6. I personally thought "Boomer" was wonderful and a perfect best buddy for Timmy, but either the actor didn't want to continue the role, or the producers wanted more and different "friends" for future Timmy episodes.