Jumped the shark?
Ok, I know it ended a while back so I'm probably the only one on this board now, but... I'm keeping up with the repeats on UKTV Yesterday.
In Series 25's opener, Jurassic - No Parking (love the title), Miss Davenport (played by Josephine Tewson) joins as a regular. In the ladies' coffee morning, Nora Batty mentions scouring her step, to which Miss D replies, "I love these quaint northern customs!". Roy Clarke really let me down with that line. It's far too much of a cynical knowing dig at southern metropolitan types, and really jarred with the rest of what was an otherwise fine episode. For me, that line is where the series "jumps the shark" and seems to step out of the "Summer Wine land" bubble.
Ironically, the giant model dinosaur at the centre of the episode could have been the perfect "jump the shark" moment, quite literally. But the surreal image of three old men hoiking a dinosaur through the Yorkshire hills actually works, even if this is now becoming a well-tread plot device from Mr Clarke.
By the definition of "jump the shark" on other websites, it could even have occurred when Tom 'replaced' his dad as the third man.