The Office: (NBC, 9 PM) Michael's luck could finally be taking a turn for the better as his HR arch nemesis Toby prepares to leave, and an attractive Amy Ryan prepares to take his place. And wait, whats that? Could there actually be an engagement ring in Pam's future? You'll only find out by watching tonight's hour-long season finale!
CSI: (CBS, 9 PM) In tonight's season finale, Gary Dourdan's last, Warrick is accused of killing a gangster, but can't remember whether he's guilty or innocent, which kind of makes Dourdan's recent personal woes look like no big whoop.
ER: (NBC, 10 PM) Steve Buscemi guests as a drunk who just can't seem to get his act together, speaking of, Abby's marital problems escalate when her one night stand, Chief Moretti (Stanley Tucci), comes face-to-face with Luka in this cliffhanger of a season finale.
My Name Is Earl: (NBC, 8 PM) Just when he thought he could have the best of both worlds with new wife Billie (Alyssa Milano), she gives him an ultimatum: either focus on the karma, or focus on me. What will he decide?
Lost: (ABC, 10 PM) Let the confrontations (continue) begin!