Aug. 22: What's on HDTV today

What we're watching and why:

"Arctic Mission: Climate of Change" looks interesting on Discovery HD tonight at 9. "Earth has experienced climate variations throughout history. Through interviews with climatologists, glaciologists, astrophysicists and oceanographers, find out how the climate affects globally integrated issues and explanations for global warming." Also, Monday Night Football broadcasts another preseason game in HD. You can watch the Cowboys at the Seahawks at 8 on ABC.

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

ABC: Monday Night Football -- preseason: Cowboys at Seahawks (8 p.m.)

CBS: King of Queens (8 p.m.), Everybody Loves Raymond (8:30 p.m.), Two and a Half Men (9 and 9:30 p.m.), CSI: Miami (10 p.m.)

NBC: Las Vegas (9 p.m.), Medium (10 p.m.), The Tonight Show with Jay Leno (11:35 p.m.), Late Night with Conan O'Brien (12:37 a.m.)

Fox: House (9 p.m.)

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

WB: Summerland (9 p.m.)

ESPN-HD: Monday Night Countdown (7 p.m.), MLB: TBA (8 p.m.), SportsCenter (11 p.m.)

ESPN-HD: Little League World Series (8 p.m.)