At what exact pointin time did it really start to suck the big one?
According to jumptheshark.com:
The whole “Mary goes bad” storyline from a season ago was ludicrous. It was clear at this point that the show’s writers had lost any ability to come up with believable stories. Why was Mary kicked out? Because her sibs took the babies college money and gave it to her to pay her debts (why was Mary punished if the other kids took the money). Why did she have debts? Because she bought a car. (how did she do that without a parent as a cosigner?) What other terrible things did she do? She drove once after a couple of drinks, and she was hanging out with a young married couple who used pot a few times. Bud didn’t Annie once admit trying pot when she was younger? The incredibly bad writing almost makes me believe the rumors that Spelling came up with this storyline to punish Jessica Biel for having the temerity to say she wanted out of the show.