Sept. 7: What's on HDTV today

What we're watching and why:

Clint Eastwood's award-winning "Mystic River" is airing tonight in high def on Cinemax HDTV at 7:30 p.m. Over on Discovery HD, you can enjoy a lineup of fun shows in HDTV: "Rides" at 8 p.m., "Monster Garage" at 9 and "American Chopper" at 10.

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

ABC: George Lopez (8 and 8:30 p.m.), Lost (9 and 10 p.m.)

CBS: Still Standing (8 p.m.), Yes, Dear (8:30 p.m.), King of Queens (9:30 p.m.), CSI: NY (10 p.m.), Late Show with David Letterman (11:35 p.m.)

NBC: Law & Order (9 and 10 p.m.), The Tonight Show (11:35 p.m.)

Fox: So You Think You Can Dance (8 p.m.), Bernie Mac (9:30 p.m.)

UPN: Veronica Mars (9 p.m.)

WB: One Tree Hill (8 p.m.), Smallville (9 p.m.)

ESPN-HD: NFL Live (4 p.m.), SportsCenter (11 p.m.)