What we're watching: 30 Rock and Supernatural both kick off brand new seasons tonight, but we'll also check out the Kentucky vs. South Carolina game on ESPN, or NHL action on HDNet.

Our traditional high-def listings continue below.

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

ABC (720p): Ugly Betty (8 p.m.), Grey's Anatomy (9 p.m.), Big Shots (10 p.m.)

CBS (1080i): CSI (9 p.m.), Without a Trace (10 p.m .), The Late Show with David Letterman (11:30 p.m.)

NBC (1080i): My Name is Earl (8 p.m.), 30 Rock (8:30 p.m.), The Office (9 p.m.), E.R. (10 p.m.), The Tonight Show with Jay Leno (11:34 p.m.)

Fox (720p): N/A

CW (1080i): Smallville (8 p.m.), Supernatural (9 p.m.)

MYNTV (1080i): N/A

Discovery-HD Theater (1080i): The Jeff Corwin Experience (8 & 11 p.m.), Wolverine Revealed (9 p.m.), Urban Wild (10 p.m.)

ESPN-HD (720p): SportsCenter (6 & 10:30 p.m.), CFB: Kentucky vs. South Carolina (7:30 p.m.)

ESPN2-HD (720p): College Football Live (6:30 p.m.), MLS: New York vs. Toronto (7 p.m.)

TNT-HD (1080i) : A Time to Kill (8 & 11 p.m.)

Mojo HD (1080i): London Live (7 & 7:30 p.m.), Little Nikita (8 p.m.), Taxi Driver (10 p.m.)

HDNet (1080i): NHL: Panthers at Rangers (7 p.m.), Nothing But Trailers (9:30 p.m.), NASCAR Nextel Cup (10 p.m.)

HDNet Movies (1080i) : Danger Zone (6:30 p.m.), Point of No Return (8:05 & 11:45 p.m.), Liberty Stands Still (10 p.m.)

Universal HD (1080i): Babe: Pig in the City (8 p.m.), Stargate Atlantis (10 p.m.), Surface (11 p.m.)

HBO-HD (1080i): Chepaer by the Dozen 2 (6 p.m.), Little Rock Central: 50 Years Later (9 p.m.), D.L. Hughley (10:15 p.m.)

MAX-HD (1080i) : Cape Fear (6 p.m.), Cape Fear (7:45 p.m.), The Texas Chainsaw Massacre: The Beginning (10 p.m.)

Showtime-HD (1080i): World Trade Center (7:45 p.m.), Dexter (10 p.m.), Weeds (11 p.m.), Californication (11:30 p.m.)

STZ-HD (1080i) : Zoom (7 p.m.), Stranger than Fiction (9 p.m.), Underworld: Evolution (11 p.m.)