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• At 8, ABC has a new Ugly Betty, then new episodes of Grey's Anatomy and Private Practice.
• CBS has a new Survivor at 8, followed by new episodes of CSI and Eleventh Hour.
• FOX has new episodes of Bones and Hell's Kitchen.
• The CW has a new Smallville at 8, followed by a new Supernatural.
• At 8:30, NBC has the season finale of Kath & Kim, then new episodes of The Office, 30 Rock, and ER.
• At 9, Spike has a new TNA Impact.
• At 10, Biography has a new Chris Isaak Hour.
• Discovery has a new Treasure Quest at 10.
• Food Network has a new Ace of Cakes at 10.
• Also at 10: VH-1 has a new Sober House.

Check your local TV listings for more.

After the jump, the late night talk shows.

If you've been watching NBC this week, you've probably seen all the promos for tonight's episode of ER. The episode is called "Old Times" and will feature former stars Juliana Margulies and Eriq LaSalle (joining Noah Wyle, who has been back for a couple of weeks). But one star who is supposed to be on the show before it ends in early April, George Clooney, isn't in the promos for tonight's episode. Does that mean he's not on until a later episode?

Probably not. Producer John Wells is telling fans to make sure they watch tonight's episode, and Margulies has already said that she has filmed scenes with Clooney, so it's a good bet that he's on tonight's episode. Also, if you notice that at the very end of the promo, the screen suddenly goes black when Margulies says hello to someone she sees. Above is a pic of Clooney on the set when he filmed his scenes in January.

'ER'
(10PM, NBC)
Is he or isn't he? That's the not-so-secret secret, as original series star George Clooney is rumored to make a cameo appearance.

What's confirmed: Clooney's fellow former co-stars, Eriq La Salle and Julianna Margulies return just weeks before the April 2 series finale, as La Salle's Peter pops in to visit Noah Wyle's ailing Carter. Margulies is back as Carol Hathaway, and the actress says she only agreed to visit when Clooney agreed to return as Hathaway's love Dr. Doug Ross.

As for what the on-screen lovers might be up to now, it's all very hush-hush, but producer John Wells has hinted that Hathaway-Ross fans will be happy with the storyline.

It's not easy winnowing more than 50 years of small-screen gems into a list of 50.

But AOL TV's picks of the top TV dramas include the most brilliant doctors and lawyers, the angst-iest teens, sci-fi series that transcend their genre molds, family dramas that both warm and break your heart, terrorist- and mobster-fighting heroes ... and a show that combined the best of family and gangster drama into one unforgettable series.

Click through to see all 50 of the best TV dramas of all time.

Here are the new TV DVDs, in stores tomorrow.

I should be happy when there are a ton of new DVDs but nothing I want to buy, because I'll save some money. But this has been happening a lot lately. I mean, there must be something being released soon that I must own. I might have to get the Return of the Man From U.N.C.L.E. movie if it wasn't included in the complete series set I have.

Kinda amazed that My Two Dads has been released on DVD, though I shouldn't be because it seems like a lot of shows are making their way to DVD now. It makes me hopeful that other sitcoms from that era will be released too.

• 7th Heaven - Season 8
• Chowder - Vol. 2
• Doctor Who - The Androids of Tara, Key To Time, The Armageddon Factor, The Power of Kroll, The Pirate Planet, The Stones of Blood, and The Ribos Operation (all Special Editions)

I've been pretty hard on NBC of late, like calling for Jeff Zucker's head when NBC announced it will present Jay Leno every weeknight in prime time next fall, but I think I'm going to have to tip my cap to the network for how ER is coming to an end.

Not only have the producers lured George Clooney and Juliana Margulies back for a last go-round, they've also cast Oscar-winner Susan Sarandon for a guest turn. George, Julianna and Susan will all appear on ER on March 12.

I'm curious to see their appearances, but here's the casting that will have me definitely tuning in: Alexis Bledel is booked for ER two-hour finale on April 2.

• At 8, ABC has a new Ugly Betty.
• CBS has a new Survivor at 8, then new episodes of CSI and Eleventh Hour.
• NBC has the special Secrets of the Furious Five at 8, followed by a new Kath & Kim.
• FOX has a new American Idol at 8, then a new Hell's Kitchen.
• PBS has Stevie Wonder In Performance at The White House at 8.
• Discovery has a new HowStuffWorks at 8.
• At 9, Spike has a new TNA Impact!
• At 9:30, NBC has a new 30 Rock, then a new ER.
• At 10, USA has a new Burn Notice.
• Biography has the series premire of The Chris Isaak Hour at 10.
• There's a new episode of The Beast on A&E at 10.
• History Channel has a new Ax Men at 10.
• At 10:30, Cartoon Network has a new Delocated.

Check your local TV listings for more.

After the jump, the late night talk shows.

Oh, ER. Not again, not again.

If you watched last night's episode of ER, you saw the return of Dr. John Carter. His wife is visiting family in Paris, and he's back in Chicago to...well, we don't exactly know why he's back yet, but he's actually going to be working part-time at County General again. That's the only good news about what happened last night (I thought this was just going to be a quick visit by Wyle for a few episodes, I didn't realize he'd be working at the hospital again) because the ending probably made longtime ER fans sigh and/or grit their teeth.

The last scene showed Carter hooked up to...well, I'm not a doctor, but I'm assuming it's a dialysis machine or some sort of cancer treatment? He had a haunted look on his face, and he had a rather somber attitude throughout the entire episode. Scenes from episodes coming up showed Carter saying that he came back to Chicago specifically to talk to Dr. Banfield (?) and we also saw a scene of Carter dropping to the floor in the emergency room looking really, really bad.

Are they going to kill off Carter a la Mark Greene?

• At 8, ABC has a new Ugly Betty, followed by new episodes of Grey's Anatomy and Private Practice.
• CBS has a new Survivor at 8, then new episodes of CSI and Eleventh Hour.
• NBC has new episodes of My Name Is Earl and Kath & Kim.
• FOX has a new Bones at 8, then a new Hell's Kitchen.
• At 9, Spike has a new TNA Impact.
• At 10, NBC has a new ER.
• USA has a new Burn Notice at 10.
• There's a new episode of The Beast on A&E at 10.
• Lifetime Movie Network has the movie Taken in Broad Daylight at 10.
• At 10:30, Cartoon Network has a new Delocated.
• At 12:15am, Cartoon Network has a new Xavier: Renegade Angel.

Check your local TV listings for more.

After the jump, the late night talk shows.

If you're a fan of '70s and '80s TV, you've probably been having a bunch of a "wha the?" moments over the last year or so. When this particular little white-haired older lady shows up on a show, she doesn't look familiar, but then you hear the matronly but deep voice, and you realize who you've just seen on your screen.

It's Mrs. Garrett! Only by the time you realize it, she's gone, leaving you to wonder if you were imagining things.

Don't worry; you're not going insane. We've been seeing a lot of Charlotte Rae, who played Edna Garrett on Diff'rent Strokes and The Facts of Life, on TV lately, mostly playing tiny roles that involve maybe a few lines at the most. In fact, just last night, she played a suspect's mother on an episode of Life.

'My Name Is Earl'
(8PM, NBC)
It's been fun and all – seeing Joy trying to fit in with her 'Knots Landing'-ish cul-de-sac neighbors was a hoot – but tonight's 'Earl' may finally bring an end to Joy and Darnell, aka Crab Man's, Witness Protection Program jaunt, and it's all because of a visit from Darnell's long-lost papa.

Danny Glover plays the senior Crab Man, who pops up in Camden to make amends with his boy. But Earl and Randy (well, Earl, anyway) suspect he has other motives, and when they set off to find and warn Darnell, it leads to a father/son undercover mission and, hopefully, a return to the trailer park for Joy and her fam.

• At 8, ABC has a new Ugly Betty, followed by new episodes of Grey's Anatomy and Private Practice.
• CBS has the season premiere of Survivor at 8, then new episodes of CSI and Eleventh Hour.
• NBC has new episodes of My Name Is Earl, Kath & Kim, The Office, 30 Rock, and ER.
• FOX has the NAACP Awards at 8.
• Discovery has a new HowStuffWorks at 8.
• At 9, Spike has a new TNA Impact!
• Sci-Fi is showing the movie Serenity at 9.
• At 10, USA has a new Burn Notice.
• There's a new episode of The Beast on A&E at 10.
• Food Network has a new Ace of Cakes at 10.
• Discovery has a new Treasure Quest at 10.

Check your local TV listings for more.

After the jump, the late night talk shows.

'30 Rock'
(9:30PM, NBC)
Her career may be thriving, but so far, love has eluded Liz Lemon. Luckily for her, she's getting three episodes to close the deal with her new neighbor – the handsome and newly single Dr. Drew Baird, played by 'Mad Men' star Jon Hamm.

The hapless-in-love is gonna need all three episodes, too, as, like usual, she doesn't exactly make a great first impression on the good doctor.

Meanwhile, Jack's got his own romantic woes, as he tries to convince Elisa's (Salma Hayek) grandmother that he's a good catch. Too bad granny can't stop thinking about how much the GE honcho reminds her of the villain on her favorite Spanish soap opera.