* The Deep End (8/7c ABC)
Five first-year associates are thrown into "the deep end" at a prestigious L.A. law firm in the pilot of this legal drama. Most recognizable among the youngbloods are Mehcad Brooks (Eggs from HBO's True Blood) as the group's alpha dog, and Tina Majorino (Veronica Mars, Big Love) as the straight arrow. The firm's managing partners represent a dichotomy - Billy Zane's character goes by The Prince of Darkness while Clancy Brown's is pushing for sainthood. Lawyers, start your briefs.
The spy drama returns for the second half of its third season with an episode that's sure to be a treat for Cagney & Lacey fans. Tyne Daly guest stars alongside her former partner in crime-fighting, Sharon Gless, as a potential intelligence contact that Michael asks Madeline to cultivate. Meanwhile, Michael tangles with violent con men and also tries to figure out who's going to extreme measures to get his attention.
Conspiracy theorists alert! Few things get skeptics of ambiguous historical narratives excited like the assassinations of U.S. presidents, and tonight the Jeffersonian team does its duty in the name of national security. It all starts when a no-nonsense government agent (Richard T. Jones) locks down the lab and orders Brennan and the squints to get to the bottom of a very famous murder. But it's all too much for Booth and his boss (Diedrich Bader), who come up with a risky plan to find out on their own.
* Grey's Anatomy (9/8c ABC)
Izzie's back tonight. Of course, when we last saw Alex he was hitting the hay with Lexie after she had broken up with Mark. But Mark spurned Addison after they hit the hay (her office floor, actually) on Private Practice last week: Will Mark try to reconnect with Lexie? And that's not all: How will Cristina react now that she knows about Teddy's feelings for Owen? Ain't love grand? Meanwhile, Derek has learned of the Chief's drinking problem and will do something about it.
* CSI: Crime Scene Investigation (9/8c CBS)
Foul play rocks a Las Vegas golf tournament when a legendary golf pro is found dead on the back nine during the event, and the evidence suggests he was murdered. The investigation also reveals the more "swinging" side of the sport. Golfers Natalie Gulbis, Rocco Mediate, Gary McCord and Duffy Waldorf guest star as themselves, as well as former pro David Feherty.