SmallvilleWhat we're watching: It's a rare appearance for WB on our list tonight. Or should we say CW? Anyway, the folks over at TV Squad have us all jacked up for the 100th episode of "Smallville" which takes flight tonight at 8 p.m. on WB. The 1080i presentation, called "Reckoning", promises to be a doozy and if you've got a shade over two minutes to spare and don't mind spoilers, you can cop a peek over at AOL. Just don't spoil it for Jor-El, Clark or the rest of us with any comments until AFTER the show. Deal?

After the jump is our traditional listing of HD programs throughout the night.

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

ABC (720p): Crumbs (9:30 p.m.)

CBS (1080i): CSI (8 p.m.), CSI (9 p.m.), Without a Trace (10 p.m.), The Late Show with David Letterman (11:35 p.m.)

NBC (1080i): Will & Grace (8 p.m.), Four Kings (8:30 p.m), My Name is Earl (9 p.m.), The Office (9:30 p.m.), E.R. (10 p.m.)The Tonight Show with Jay Leno (11:35 p.m.)

Fox (720p): The O.C. (9 p.m.)

UPN (1080i): Everybody Hates Chris (8 p.m.), Love, Inc. (8:30 p.m.), Eve (9 p.m.), Cuts (9:30 p.m.)

WB (1080i): Smallville (8 p.m.)

Discovery-HD (1080i): American Chopper (6 p.m.), Dinosaur Planet (7 p.m.), Corwin's Quest (8 & 11 p.m.), Austin Stevens: Snakemaster (9 p.m.), Uncharted Waters: Florida's Aqua Caves (10 p.m.)

ESPN-HD (720p): SportsCenter (6 & 11 p.m.), College Basketball: Duke at Virginia Tech (7 p.m.)

INHD (1080i): AQHA World Reigning Championships (8 p.m.), Olympic Treasures: Seoul 1988 (9 p.m.), 2005 World Series Recap (11:30 p.m.)

INHD2 (1080i): Twilight Zone #15 (7 p.m.), Twilight Zone #16 (7:30 p.m.), Discoveries...America: Delaware (8 p.m.), In Theaters (9 p.m.), Go! Greenwich Classic Car Show (9:30 p.m.), Forensic Factor: Deadly Affair (10 p.m), Isle of Wight: David Bowie (11 p.m.)

HBO-HD (1080i): Batman and Robin (5:45 p.m.), Flight of the Phoenix (9 p.m.)

Showtime-HD (1080i): Mermaids (6 p.m), Saw (8 p.m.), The L Word (11 p.m.)

TNT-HD (1080i): Charmed (6 p.m.), Law & Order (7 p.m.), NBA Basketball: Suns at Heat (8 p.m.), NBA Basketball: Mavericks at SuperSonics (10:30 p.m.)

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