Well, we have at least one Beverly Hills, 90210 vet not making fast tracks back to West Bev.Carol Potter, who played mom to Brandon, his sideburns and Brenda on the primetime sudser, is joining ABC Family's Greek this coming season. Potter will fill the recurring role of Paula, a ZBZ alumna who turns out to play a pivotal role in Caseys (Spencer Grammer) future. And yes, I already ran my "Casey is adopted and Paula is her bio mom" theory by the ABCF rep, and she's still laughing. Greek returns (with Charisma) Aug. 26. Matt MitovichWant scoop? E-mail Matt and Mickey at firstname.lastname@example.org. The Mega Buzz column answers your questions every Wednesday.