HDTV Listings for March 12, 2010

What we're watching tonight:

• NBC (1080i) has Who Do You Think You Are? at 8 p.m.
• MyNetworkTV (720p) has WWE SmackDown at 8 p.m.
• Syfy (1080i) has Caprica at 9 p.m.
• CBS (1080i) brings Ghost Whisperer at 8 p.m., Medium at 9 p.m. and Numb3rs at 10 p.m.
• TLC (1080i) airs What Not to Wear at 9 p.m. and Four Weddings at 10 p.m.
• Starz (1080i) has Spartacus: Blood & Sand at 10 p.m
• HBO (1080i) has The Ricky Gervais Show at 9 p.m., The Life and Times of Tim at 9:30 p.m., Real Time with Bill Maher at 10 p.m. and Funny or Die Presents at 11:59 p.m.
• Discovery (1080i) brings American Loggers at 10 p.m.