HDTV Listings for August 23, 2009

What we're watching tonight:

• NBC (1080i) has the season finale of Merlin at 7 & 8 p.m.

• History (720p) has the season finale of Ice Road Truckers at 9 p.m. and Pawn Star$ at 10 & 10:30 p.m.]

• AMC (720p) has Mad Men at 10 p.m.

• HBO (1080i) lines up True Blood at 9 p.m., Hung at 10 p.m. and Entourage at 10:30 p.m.

• ABC (720p) has Defying Gravity at 10 p.m.

• ESPN (720p) has Yankees/Red Sox at 8 p.m.

• ESPN2 (720p) has Little League World Series at 8 p.m. and NHRA Nationals at 10 p.m.