NBC spices up rerun season with a three-hour Will & Grace (8 p.m., NBC) marathon, six of the series' juiciest episodes (as chosen by a fan poll), aired back-to-back. Biography (8 p.m., A&E) continues a week of shows on TV moms with a profile of Yvonne "Lily Munster" DeCarlo. Buffy the Vampire Slayer (8 p.m., WB) reruns the episode where Faith and Buffy switch bodies; the episode continues on Angel (9 p.m., WB), with the rogue slayer back to her bad self and on the prowl in L.A. P.O.V. (check local times, PBS) presents "Blink," a documentary about ex-white supremacist Greg Withrow.
When the supermodels are away, the dogs will play: Fashion capital Milan, Italy, becomes the canine capital as more than 16,000 elite show pooches work it at the 2000 World Dog Show (9 p.m., USA).
Braves at Devil Rays (7:05 p.m., TBS)
Rosie O'Donnell (syndicated) Michelle Pfeiffer, En Vogue (rerun)
David Letterman (CBS) Marilu Henner, Dixie Chicks (rerun)
Jay Leno (NBC) Rebecca Romijn-Stamos, triplets from "Me, Myself and Irene"
Politically Incorrect (ABC) Eric Roberts, Adam West
Conan O'Brien (NBC) William Shatner, Sonic Youth