Chris Rock is the subject of a new Biography (8 p.m., A&E), which kicks off the series' "Groundbreaking Comedians" week. Everybody Loves Raymond (8:30 p.m., CBS) has a pair of reruns that are chock-full of parental angst. In the first episode, Ray is shocked to learn that Ally is a bully; in the second (9 p.m.), Ray and Debra find out that one of the twins is smarter than the other. Investigative Reports (9 p.m., A&E) presents "Rehab," which spends six months with patients in a Harlem clinic for drug addicts. Roswell (9 p.m., WB) moves to Mondays with an episode in which Liz is tipped off that Max and his friends are the targets of a government investigation into extraterrestrial activity. On Once & Again (10 p.m., ABC), Lily is uncomfortable around the hip young things at her new job, while Grace throws yet another hissy fit when she sees how young her father's new girlfriend is.
The American President (check local times, PBS) continues with an episode about "independent thinkers" John Adams, Zachary Taylor, Rutherford B. Hayes and Jimmy Carter, followed by another on "professional pols" Martin Van Buren, James Buchanan, Abraham Lincoln and Lyndon Johnson. The new cable movie Sex and Mrs. X (9 p.m., Lifetime) stars Linda Hamilton as a reporter whose husband has dumped her for a younger woman, so she asks a Paris madam (Jacqueline Bisset) for some advice. But of course!
Pacers at Knicks (8 p.m., TBS)
Trail Blazers at Jazz (10:30 p.m., TBS)
Rosie O'Donnell (syndicated) Samuel L. Jackson, Joni Mitchell
David Letterman (CBS) Sandra Bullock
Jay Leno (NBC) David Arquette, Elizabeth Perkins, Oasis
Politically Incorrect (ABC) Julia Butterfly Hill, Zack Galifinakis
Conan O'Brien (NBC) Angelina Jolie (rerun)
Craig Kilborn (CBS) Donny Osmond