i don't like the show, but this may make it worthwile!

Brenda Walsh haters, unite: The bitch is back. Well, a variation of her, at least. Variety reports former "Beverly Hills 90210" bad girl Shannen Doherty is joining the cast of "North Shore" as Alexander Hudson, the ruthless long-lost sister of Brooke Burns. The temperamental star has signed on for three episodes of the Hawaii-set Fox soap, with an option for more.