"EXPLORER: WORLD'S MOST DANGEROUS DRUG" (8 P.M., NATIONAL GEOGRAPHIC CHANNEL): METHAMPHETAMINE IS CONSIDERED ONE OF THE HARDEST DRUGS TO KICK (AN ESTIMATED NINE OF 10 USERS WHO TRY TO QUIT WILL

"Explorer: World's Most Dangerous Drug" (8 p.m., National Geographic Channel): Methamphetamine is considered one of the hardest drugs to kick (an estimated nine of 10 users who try to quit will relapse). Easily manufactured in hidden labs using store-bought materials, it has spread through rural communities and cities alike, both in the United States and globally. What makes it so powerful, addictive and destructive? Lisa Ling examines this epidemic on "Explorer: World's Most Dangerous Drug."
"Top Chef" (11 p.m., Bravo): "Top Chef" is a reality competition series that peeks beneath the lid of the pressure-cooker restaurant business. The show follows 15 aspiring chefs as they gather in Los Angeles to vie for their shot at culinary stardom and the chance to earn the Top Chef title. Actress Padma Lakshmi is the new host.
"Project Runway" finale (10 p.m., Bravo): For weeks, they've been showing off their dresses -- some dazzling, some disastrous -- but now it's time for the fashion-minded finalists to sew things up and determine a winner. Tonight's episode caps an eventful third season and is the back end of a two-parter that began last week with the fab four working on their collections for New York's prestigious Fashion Week. Gorgeous host Heidi Klum will present 100,000 to the winner, who also gets a spread in Elle magazine.
"Lost": (9 p.m., ABC): The new season of "Lost" continues with an episode that finally lets us in on what happened to Locke, Eko and Desmond after the hatch went ka-boom. Meanwhile, Hurley reports back to camp with the sad news that fellow castaways Jack, Kate and Sawyer have been abducted by those sinister islanders known as the Others.
"Black Movie Awards" (10 p.m., TNT): Tyler Perry ("Madea's Family Reunion") hosts the 2006 Black Movie Awards, an annual gala designed to celebrate past and present creative contributions in the cinema. Cicely Tyson and Laurence Fishburne are scheduled to receive special career honors and "Lady Sings the Blues," the big-screen Billie Holiday biography, gets inducted into the program's Hall of Fame. "Crash" and "Hustle and Flow" are the top nominees. Cedric the Entertainer is host.