HDTV Listings for March 4, 2011

What we're watching tonight:

• CW (1080i) has Smallville at 8 p.m. and Supernatural at 9 p.m.
• NBC (1080i) has Who Do You Think You Are? at 8 p.m.
• Syfy (1080i) has WWE Smackdown at 8 p.m. and Merlin at 10 p.m.
• CBS (1080i) has The Defenders at 8 p.m.
• TLC (1080i) has Say Yes to the Dress at 9 & 9:30 p.m. and DC Cupcakes at 10 p.m.
• Discovery (1080i) has Flying Wild Alaska at 9 p.m. and the season premiere of American Loggers at 10 p.m.
• BBC America (1080i) has Law & Order: UK at 9 p.m.
• IFC (1080i) has Onion News Network at 10 p.m.
• HBO (1080i) has The Ricky Gervais Show at 9 p.m., Real Time with Bill Maher at 10 p.m. and Funny or Die Presents at 11:59 p.m.
• ESPN (720p) has an NBA doubleheader with Bulls/Magic at 7 p.m. and Heat/Spurs at 9:30 p.m.
• ESPN2 (720p) has Akron/Kent State college basketball at 7 p.m. and Friday Night Fights at 9 p.m.