HDTV Listings for April 23, 2010

What we're watching tonight:

• CW (1080i) has Smallville at 8 p.m.

• Discovery (1080i) has the spring premiere of Swamp Loggers at 9 p.m. and the season finale of American Loggers at 10 p.m

• Syfy (1080i) airs Stargate Universe at 9 p.m. and Merlin at 10 p.m.

• CBS (1080i) has Miami Medical at 10 p.m.

• TLC (1080i) has the season premiere of Say Yes to the Dress at 9 & 9:30 p.m. and Four Weddings at 10 p.m.

• Starz (1080i) has the season premiere of Party Down at 10 p.m. and the series premiere of Gravity at 10:30 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.

• Cartoon Network (1080i) has the series premieres of Ben 10 at 8 p.m. and Generator Rex at 8:30 p.m., then Star Wars: The Clone Wars at 9 p.m.

• ESPN2 (720p) has NFL Draft coverage from 7 p.m.

• ESPN (720p) has an NBA doubleheader with Celtics/Heat at 7 p.m. and Mavericks/Spurs at 9:30 p.m.

• Versus (1080i) has hockey with Canadiens/Capitals at 7 p.m. and Red Wings/Coyotes at 10 p.m.