"MALCOLM IN THE MIDDLE" CELEBRATES 100TH EPISODE SUNDAY, DECEMBER 12, ON FOX

Laurie Metcalf Guest-Stars

In the milestone 100th episode, Lois' younger sister, Susan (guest star Laurie Metcalf), pays the family a visit and brings expensive gifts for the boys, biting remarks for Lois and a cold shoulder for Hal � whom she has never forgiven for dumping her for Lois. Lois and Susan's competitive relationship takes a turn for the worse when Susan gives Malcolm and Reese her prize '65 Mustang convertible. But when Lois discovers that Susan needs a kidney transplant, she puts her anger aside and offers to donate her kidney to Susan, which Susan only sees as the perfect opportunity for Lois to one-up her on the 100th episode of MALCOLM IN THE MIDDLE, "Lois' Sister," airing Sunday, Dec. 12 (7:00-7:30 PM PT) on FOX. (MIM-513) (TV-PG L).

Cast: Jane Kaczmarek as Lois, Bryan Cranston as Hal, Frankie Muniz as Malcolm, Christopher Masterson as Francis, Justin Berfield as Reese, Erik Per Sullivan as Dewey and Craig Lamar Traylor as Stevie.

Guest Cast: Laurie Metcalf as Susan, Kenneth Mars as Otto and Meaghan Fay as Gretchen.

(EDITOR'S NOTES: Due to an NFL doubleheader, this 7:00 PM episode of MALCOLM IN THE MIDDLE airs on the West Coast only; KING OF THE HILL is preempted this night.)