Buffy the Vampire Slayer (8 p.m., WB) airs its first new episode since "The Body" ran on Feb. 27. Buffy is comforted by an old boyfriend (OK, it's Angel) after she buries her mom. Nova (8 p.m., PBS, check local listings) presents "Cracking the Code of Life," correspondent Robert Krulwich's report on the race to map the human genome. The new reality series Chains of Love (8 p.m., UPN) premieres. It's the one in which four suitors are chained to a member of the opposite sex for four days on the longest blind date in history. Sure, it's crap. Sure, you'll watch. Angel (9 p.m., WB) has a new episode, too. Cordelia's high school friend Harmony (now a vamp who's been jilted by Spike) turns up in Los Angeles. The new sci-fi series All Souls (9 p.m., UPN) stars Grayson McCouch (you gotta love a guy named Grayson McCouch) as a new doctor at a haunted Boston hospital. Aaron Spelling produced it. Joan meets Jake's judgmental parents on What About Joan (9:30 p.m., ABC). On NYPD Blue (10 p.m., ABC), Andy and Danny aid a cop who was shot while attempting to commit a crime.
The new TV movie Passion and Prejudice (9 p.m., USA) stars Frances Fisher as a repressed scholar who becomes sexually obsessed with a convict (Derwin Jones).
Flyers at Sabres, Game 4 (7 p.m., ESPN)
Devils at Hurricanes, Game 3 (7:30 p.m., ESPN2)
Blues at Sharks, Game 4 (10:30 p.m., ESPN2)
76ers at Pacers (8 p.m., TBS)
Rosie O'Donnell (syndicated) Timothy Hutton, Valerie Harper
David Letterman (CBS) Jerry Seinfeld, Paul Simon (rerun)
Jay Leno (NBC) Camryn Manheim, Mark Cuban
Politically Incorrect (ABC) Jason Alexander, Jewel (rerun)
Conan O'Brien (NBC) Paul Hogan, Lewis Black
All times Eastern unless noted.