Anybody got any opinions on when sitcoms have "jumped the shark" and lost the plot big time? I think the most obvious example of this was the last series of Roseanne, when they won the lottery and became millionaires. The whole thing went completely against the ethos of the show, and the crossover episode with the AB Fab characters was cringeworthy.
A more recent example of Jumping The Shark is the second series of Extras. I thought it lost touch with reality on countless ocassions, none more so than in the Bafta episode. Moira Stewart dealing drugs to Ronnie Corbett? Silly, and not the sort of comedy Gervais can carry off.