July 31: What's on HDTV today

Here are the HDTV programs showing on some selected networks today, along with "what we're watching and why." All times are Eastern:

ABC: Desperate Housewives (9 p.m.), Grey's Anatomy (10 p.m.)

CBS: Cold Case (8 p.m.), I Am Sam (9 p.m.)

NBC: Law & Order: Criminal Intent (9 p.m.), Crossing Jordan (10 p.m.)

Fox: Malcolm in the Middle (7 p.m.)

UPN: Veronica Mars (8 p.m.)

ESPN-HD: Baseball Tonight (7 p.m.), MLB: White Sox at Orioles (8 p.m.), SportsCenter (11 p.m.)

What we're watching and why: It's Sunday night, so it must be baseball in HDTV. You can catch the White Sox and Orioles on ESPN-HD at 8 p.m.