What we're watching: Which is faster, a race car, or pure SEC SPEED? You decide, with NASCAR on ABC tonight, and LSU vs. Va Tech on ESPN and South Florida vs. Auburn on ESPN2. Also keep an eye out for NBC's fall preview show, and Sarah Michelle Gellar in The Return on Cinemax.

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, premieres in bold:

ABC (720p): Chevy Rock and Roll 400 (7 p.m.)

CBS (1080i): U.S. Open Tennis (8 p.m.)

NBC (1080i): NBC Fall Preview Party (8:30 p.m.), Law & Order: CI (9 p.m.), Saturday Night Live: Peyton Manning (11:29 p.m.)

Fox (720p): N/A

CW (1080i): N/A

TNT-HD (1080i): Ocean's Eleven (8 p.m.), Shattered (10:30 p.m.)

Discovery-HD (1080i): Sunrise Earth (7 p.m.), Edge of Existence (8 & 11 p.m.), Silhouettes of the Desert (9 p.m.), National Trust Gardens (10 p.m.)

ESPN-HD (720p): College Football Scoreboard (9 p.m.), CFB: Virginia Tech vs. LSU (9:15 p.m.)

ESPN2-HD (720p): College Football Scoreboard (8:45 p.m.), CFB: South Florida vs. Auburn (9 p.m.)

Mojo HD (1080i): Beer Nutz (7 & 10:30 p.m.), Uncorked with Billy Merritt (7:30 p.m.), Beer Nutz (8, 8:30, 9, 9:30 & 11:30 p.m.), Timeless (10 p.m.), Howard Stern (11 p.m.)

HDNet (1080i): Switchback (6:30 & 11 p.m.) MLS: Real Salt Lake at Houston Dynamo (8:30 p.m.), Nothing But Trailers (10:30 p.m.)

HDNet Movies (1080i): The Silence of the Lambs (8:15 p.m.), The World's Fastest Indian (10:05 p.m.)

Universal HD (1080i): Surface (8 p.m.), Firefly (9 p.m.), October Sky (10 p.m.)

HBO-HD (1080i): Superman Returns (8 p.m.), Bury My Heart at Wounded Knee (10:40 p.m.)

Showtime-HD (1080i): World Trade Center (8 p.m.), The Last Holiday (10:15 p.m.)

MAX-HD (1080i): The Ringer (8:15 p.m.), The Return (10 p.m.)

STZ HD (1080i): Little Man (7:20 p.m.), Open Season (9 p.m.), Click (10:30 p.m.)

The hundred gadget giveaway: round 20