"America's Next Top Model" (8 p.m., UPN): The four remaining contenders on "America's Next Top

"America's Next Top Model" (8 p.m., UPN): The four remaining contenders on "America's Next Top Model" appear primed for a fight to the finish. Tonight, while in Thailand, the models are introduced to famed designer Pitchita Rucksajit, who sends them out to meet and impress local people in the biz.
"Lost" (9 p.m., ABC): Somehow, the surreal and densely plotted "Lost" has managed to avoid a sophomore creative slump. But still, a strong finish is a must. With only three episodes left, Mr. Eko seeks Locke's help in finding a secret location that he thinks holds the key to the mysteries of the whacked-out island.