Banishment candidates Jordan and Curtis make all the others nervous on Big Brother (8 p.m., CBS). Friends (8 p.m., NBC) reruns the one where Reese Witherspoon guests as Rachel's naughty sister. 48 Hours (10 p.m., CBS) looks at tornadoes. It's the only programming tonight that blows harder than "Big Brother"!
Laurence Fishburne and Sam Neill star in the 1997 sci-fi thriller Event Horizon (8 p.m., Fox), about a mission to find the cause of a spacecraft's mysterious disappearance. Oh, why do they want to go and do that? No good can come of it, no siree. 'N Sync: Live from Madison Square Garden (9 p.m., HBO) finds the boys of the hour in concert on one of the last stops of their "No Strings Attached" tour.
Marlins at Braves (7:35 p.m., TBS)
Rosie O'Donnell (syndicated) Britney Spears, Ricky Martin (rerun)
David Letterman (CBS) Connie Chung
Jay Leno (NBC) Dennis Miller
Politically Incorrect (ABC) Margaret Cho, William Shatner
Conan O'Brien (NBC) Dave Chappelle, Sarah Vowell