"7th Heaven" (8 p.m., the WB): It was recently announced that "7th Heaven" will be calling it quits next spring after 10 remarkably successful seasons -- even though its ratings remain robust. In

"7th Heaven" (8 p.m., the WB): It was recently announced that "7th Heaven" will be calling it quits next spring after 10 remarkably successful seasons -- even though its ratings remain robust. In tonight's episode, the demands of Simon's school and work keep him from celebrating Thanksgiving with the family.
"Is It Real?" (8 p.m., National Geographic): Tonight's episode, "Extreme Sleepwalking," looks at people who have claimed they were sleepwalking when they committed serious crimes, even murder. The documentary says the difficult question of whether they should be held responsible "lies at the crossroads of science and the law."