I liked The Beverly Hillbillies through Season Six. Seasons seven and eight involved the Clampetts inheriting castles in England, which was the "jump the shark" moment for me. Also, because times were changing, Nancy Kulp stopped doing her nerdy spinster schtick and started playing Miss Jane much more blandly. The black and white years were pure gold, and the first two color ones were fine. Those I would like to have. Petticoat Junction, for me, never really "jumped the shark" though it never recovered from the loss of Bea Benederet either. Still, the writing during the June Lockhart seasons remained strong and the three girls, especially Lori Saunders, blossomed into quality comedy performers to help fill the gap left by the loss of Bea. I'd collect the entire run of this show. Season Six of Green Acres always felt odd to me. Every time we went into Druckers' store, it felt strange, because Petticoat Junction had been cancelled. It seemed as if Frank Cady were presiding over a "ghost town" somehow. However, I'd still love to get the whole run of this show as well.
I thought the Clampetts going to England and then the subsequent Jethro joining the reserves, Cousin Roy (Clark) coming to visit, etc. were still funny though it did deviate from the standard practice of most story lines being one episode and done. I do like seasons 8 & 9 but they were certainly not the typical Clampett fare. Jed never got scammed in the early years but in the last two seasons, Phil Silvers' character of Honest John took advantage of Jed for millions. Then the women's lib movement story hit with the attempt to modernize the show to current issues. My understanding is that TBH was an escape from the current issues, not a reflection thereof. You had Jethro and his Elvis-clone sideburns and Ellie didn't look like her younger self she had been in previous years. As much as I love the show, I think it would've been cancelled soon enough even without the "rural purge" that hit so many shows.
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Jethro, how come there's no ice in Californy? ~ Uncle Jed
Don't look at me, I didn't take it! ~ Jethro