What we're watching: Finales, finales, finales. Three hours of Grey's Anatomy tonight, two of them new. After last night's episode if you're a fan of the series this is a must-see. Prison Break completes its second season (it only feels like it's been on forever) with the long awaited escape, while How I Met Your Mother, One on One, All of Us and Half & Half wrap things up for the year as well. We were all "witnesses" to the Cavaliers surprising Game 3 victory over the pistons, but with a guaranSheed Pistons win tonight, there's not much sense in tuning in until Spurs-Mavericks at 10:30 p.m.

After all that, I highly recommend Discovery Channel's documentary Shipbreakers if you haven't seen it already, and there's also some show called 24...

Update: The re-air of last night's Grey's is apparently going to air after President Bush speaks, so you may want to put an extra hafl hour or hour on the DVR in case the finale does not start on time. Prison Break and 24 are both listed as being bumped 20 minutes, no word on the other networks. Also don't forget that Presidential Address' can often be a good opportunity to see the difference between the HD broadcast of each major network.

[Thanks for the heads up James!]

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, season finales are in bold:

ABC (720p): Grey's Anatomy (bumped by the Prez, maybe HD maybe not) (8 p.m.), Grey's Anatomy (9 & 10 p.m.)

CBS (1080i): King of Queens (8 p.m.), How I Met Your Mother (8:30 p.m.), Two and a Half Men (Pt 1 of 2) (9 p.m.), New Adventures of Old Christine (9:30 p.m.), CSI: Miami (10 p.m.), The Late Show with David Letterman (11:35 p.m.)

NBC (1080i): The Tonight Show with Jay Leno (11:35 p.m.)

Fox (720p): Prison Break (8 p.m.), 24: Day Five: 4 AM to 5 AM (9 p.m.)

UPN (1080i): One on One (8 p.m.), All of Us (8:30 p.m.), Half & Half(9 & 9:30 p.m.)

WB (1080i): Everwood (9 p.m.)

Discovery-HD (1080i): O'Shea's Big Adventure (7 p.m.), Shipbreakers (8 & 11 p.m.), Journey Through India (9:30 p.m.), Engineering Supermax Prisons (10 p.m.)

TNT-HD (1080i): Charmed (6 p.m.), Law & Order (7 p.m.), NBA Playoffs: Pistons at Cavaliers (7 p.m.), NBA Playoffs: Spurs at Mavericks (10:30 p.m.)

ESPN-HD (720p)
: SportsCenter (6 & 11 p.m.), MLB Baseball: Red Sox at Orioles (7 p.m.), Baseball Tonight (10 p.m.)

INHD (1080i): Rugby Union (7 & 7:30 p.m.), Boxing: Hill vs. Brudov (8 p.m.) F2: Forensic Factor (9 p.m.), Rush in Concert (10 p.m.)

HDNet (1080i): True Music (7 p.m.), Smart Travles Europe with Randy Maxa (7:30 p.m.), Smallville (8 & 11 p.m.), Joan of Arcadia (9 & 10 p.m.)

HDNet Movies (1080i): Sniper (6:15 p.m.), Jakob the Liar (8 p.m.), Into the West (10:05 p.m.)

HBO-HD (1080i): Spiderman 2 (5:45 p.m.), Troy (9 p.m.)

Showtime-HD (1080i):  Hotel Rwanda (5 p.m.), Huff (9 p.m.)

MAX-HD (1080i): The Hunt for Red October (5:45 p.m.), The Upside of Anger (8  p.m.), The Chronicles of Riddick (10 p.m.)

STZ HD (1080i): The Notebook (6:45 p.m.), The Pacifier (9 p.m.),  Cape Fear (10:45 p.m.)