Elizabeth Alice Broderick (born February 24, 1959) is an American actress. She portrayed Zelda Spellman in the ABC/WB television sitcom Sabrina the Teenage Witch (1996โ2003). She also had recurring roles as Diane Janssen in the ABC mystery drama series Lost (2005โ2008) and as Rose Twitchell in the CBS science fiction drama series Under the Dome...