What we're watching: No Heroes tonight, although we've got 24 and back to back new episodes of The New Adventures of Old Christine.

Our traditional high-def listings continue below.

Here are some other HDTV programs showing on selected networks today. All times are Eastern and reruns are in italics:

ABC (720p): What About Brian (10 p.m.)

CBS (1080i): The New Adventures of Old Christine (8 & 8:30 p.m.), Two and a Half Men (9 p.m.), Rules of Engagement (9:30 p.m.), CSI: Miami (10 p.m.), The Late Show with David Letterman (11:35 p.m.)

NBC (1080i): The Black Donnellys (10 p.m.), The Tonight Show with Jay Leno (11:34 p.m.)

Fox (720p): House (8 p.m.), 24 (9 p.m.)

CW (1080i): Everybody Hates Chris (8 p.m.), All of Us (8:30 p.m.), Girlfriends (9 p.m.), The Game (9:30 p.m.)

MYNTV (1080:): N/A

Discovery-HD (1080i): The Blue Realm (7 p.m.), Risk Takers (8 & 11 p.m.), Delta Company (9 & 10 p.m.)

TNT-HD (1080i): Charmed (6, 7 & 8 p.m.), Law & Order (9, 10 & 11 p.m.)

ESPN-HD (720p): SportsCenter (6 & 11 p.m.), NCAA Women's Basketball Selection Special (8 p.m.), College GameNight (9 p.m.)

ESPN2-HD (720p): NASCAR Now (6:30 p.m.)

INHD (1080i): London Live (7, 7:30, 10 & 10:30 p.m.), Timeless (8, 8:30, 11 & 11:30 p.m.), SFlight of the Aquanaut (9 p.m.)

HDNet (1080i): Smallville (8 & 11 p.m.), Star Trek: Enterprise (9 p.m.), Joan of Arcadia (10 p.m.),

HDNet Movies (1080i): Johnny Mnemonic (6:30 p.m.), Wise Girls (8:15 p.m.), Gunshy (10 p.m.), No Mercy (11:45 p.m.)

Universal HD (1080i): Equalizer (6 p.m.), Law & Order: SVU (7 p.m.), The Incredible Shrinking Woman (8 & 11 p.m.), Sons & Daughters (10 & 10:30 p.m.)

HBO-HD (1080i): Rome (9 p.m.), Life Support (10 p.m.)

Showtime-HD (1080i): Jiminy Glick (7:30 p.m.), The L Word (9 p.m.), Sleeper Cell (10 & 11 p.m.)

MAX-HD (1080i): Constantine (6 p.m.), The Sentinel (8 p.m.), House Party 2 (10 p.m.)

STZ HD (1080i): The Benchwarmers (9 p.m.), Are We There Yet? (10:30 p.m.)

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HDTV Listings for March 12, 2007