Rachel and Ross reveal what happened that night on Friends (8 p.m., NBC). The reality series Popstars 2 (8 p.m., WB) re-applies the "Popstars" formula, this time to a coed singing group. The thrill is gone, but Survivor: Africa (8 p.m., CBS) remains. CSI (9 p.m., CBS) has a case about the shooting death of a high school jock, seemingly by a tormented classmate. Will takes an acting class on Will & Grace (9 p.m., NBC). Sherry Stringfield rejoins the cast of ER (10 p.m., NBC) as Dr. Susan Lewis, Mark Greene's ex-girlfriend. Frontline (10 p.m., PBS, check local listings) presents "Dangerous Straits," a look at the United States' precarious relationship with China.
ALCS, Game 2, Yankees at Mariners (8 p.m., Fox)
Flyers at Red Wings (7:30 p.m., ESPN2)
Mighty Ducks at Kings (10:30 p.m., ESPN2)
Rosie O'Donnell (syndicated) Martin Short, Deborah Norville (rerun)
David Letterman (CBS) Brittany Murphy, Macy Gray
Jay Leno (NBC) Heather Graham, Daryl Hannah
Politically Incorrect (ABC) Dick Clark, Rebecca Hagelin
Conan O'Brien (NBC) Quincy Jones, Diana Krall
Craig Kilborn (CBS) Ben Folds
All times Eastern unless noted.