What we're watching tonight:
- Fox (720p) airs the season finale of Lie to Me at 8 p.m. and American Idol at 9 p.m.
- ABC (720p) has a Lost recap at 8 p.m. and the season finale at 9 p.m.
- CBS (1080i) drops in Rules of Engagement at 8 p.m. followed by The New Adventures of Old Christine, Criminal Minds and CSI: NY
- Discovery (1080i) has Time Warp at 8 p.m., Mythbusters at 9 p.m. and Pitchmen at 10 p.m.
- History (720p) airs MonsterQuest at 9 p.m. and UFO Hunters at 10 p.m.
- DirecTV (1080i) continues Smith at 10 p.m.
- Spike TV (1080i) has The Ultimate Fighter at 10 p.m.
- NBC (1080i) has Law & Order at 10 p.m.
- Comedy Central (1080i) has Reno 911 at 10:30 p.m.
- TNT (1080i) has Mavericks/Nuggets NBA Playoffs action at 9 p.m.
- ESPN (720p) has MLB with Dodgers/Phillies at 7 p.m.
- Versus (1080i) has NHL Playoffs Pittsburgh/Washington Game 7 at 7 p.m.