"Supercoasters" (8 p.m., National Geographic): For roller-coaster enthusiasts, nothing can match the

"Supercoasters" (8 p.m., National Geographic): For roller-coaster enthusiasts, nothing can match the sheer thrill of roaring down a track at speeds more than 100 mph, hands airborne and heart pounding. This two-hour special offers a glimpse inside the engineering mechanics of some of the planet's most hair-raising rides, and inside the brain mechanics that explain why some are addicted to the rush. Beloved, if outdated, coasters of the past are examined, as well as the quest to build ever-higher and ever-faster rides.
"Everwood" (9 p.m., The WB): OK, now let's all bow our heads in reverence. Not only are they holding the funeral of a beloved citizen on "Everwood" tonight, but the show itself is slipping into the Great Beyond because the new CW network has decided not to renew it for next fall.
"Washington the Warrior" (9 p.m., History Channel): See the action-hero side of George Washington in this report.
"National Open House" (10:30 p.m., HGTV): Get a look at what real estate costs around the country.