Mad Men (10pm, AMC) - In case you've been living in a spider hole, we're here to tell you that tonight is the season 3 finale of AMC's stunning series, "Mad Men." Last week's episode, despite the JFK assassination storyline, was a teeny bit of a snoozer. But perhaps that's only because the previous week's episode, in which Don was forced to come clean to Betty about his true identity, was one of the most powerful we've seen. One major development last week, apart from confirmation that Duck is completely devoid of a soul, was Betty telling Don that she no longer loves him (Also interesting? That part where she made out with her new boyfriend in the car). What happens tonight? Your guess is as good as ours, but our guess isn't as good as this guy's. Don't miss it!

Dexter (9pm, Showtime) - Quinn's very interested in Dexter's nocturnal habits, which doesn't bode well for Quinn's future. Meanwhile, John Lithgow's creepy Trinity killer is still on the loose.

Bored to Death (9:30pm, HBO) - In the first season finale of this great new show, the Edition magazine gang -- George (Ted Danson), Jonathan (Jason Schwartzman), and Ray (Zach Galifianakis) -- prepare for a triple-header boxing match against Richard (Oliver Platt) and his GQ crew. It's not pretty. It's very funny, but it's not pretty. 

Brothers & Sisters (10pm, ABC) - Not only are we still getting to look at Gilles Marini guest starring (forever, please!) as Sarah's steamy French love interest, tonight Nora (Sally Fields) turns all cougary and begins an affair with a younger oncologist working at Kitty's hospital, played by none other than Jon Tenney (you may know him as Fritz Howard on "The Closer"). And even better, Tenney's Dr. Simon will have a recurring role on the show (but only a 4-episode story arc). Gilles Marini and Jon Tenney (not to mention Rob Lowe). Sigh. 

I knew there was trouble Tuesday morning when someone called to tell me that if I hadn't seen Monday night's episode of "The Closer" yet, don't watch it. 

I guessed immediately what had happened: Kitty had died.

The first two episodes of this season's "The Closer" gave us troubling glimpses of Kitty's declining health, with Brenda and Fritz fussing over her, taking her for vet visits, and even giving her IVs in Brenda's office. So we sort of knew it was coming, right? 

The Closer, Monday January 26, 9pm, TNT

The Closer, starring Kyra Sedgwick, returns tonight for the second half of its fourth season, and the big question involves the fate of Det. Sanchez (Raymond Cruz). In the cliffhanger at the end of the first half of the season, Sanchez took some bullets while saving the life of Lt. Provenza, and the show ended with things not looking so good for Julio. . . .