NBC has officially announced its fall line-up which includes 6 new scripted series, The Jay Leno Show, and three new “alternative” programs, The Marriage Ref, Who Do You Think You Are?, and Breakthrough with Tony Robbins.

As we’ve mentioned, one of the new scripted shows the network is trying is a one-hours series based on the 1988 movie Parenthood. The show’s cast has been filled in with some of TV’s biggest names including Peter Krause (Dirty Sexy Money, Six Feet Under), Craig T. Nelson (The Family Stone, Coach), Sarah Ramos (In Treatment), and two ER alums, Maura Tierney and Miles Heizer which gives us hope the show might be pretty good but like everything else in TV, there are no guarantees.

Anther show officially added to NBC’s fall line-up is Trauma, a drama about first-responder paramedics who rush by land, sea or air to reach their victims in San Francisco.

After finally canceling the network’s longest running medical drama, ER, NBC just couldn’t resist ordering a new one to replace it. Mercy, starring Gossip Girl’s Michelle Trachtenberg and Men in Trees’ James Tupper, is about a nurse who “bucks the rules and schools the doctors at their own game.”

What is sure to be their most buzzed about new series, Day One, is about “the aftermath of a global catastrophe that has devastated the world’s infrastructures and an eclectic band of survivors who try to rebuild society and figure out what happened. Not surprisingly, the show is produced by Jesse Alexander who teamed with J.J. Abrams for Lost and Alias.

Chevy Chase is returning to TV in Community, a sitcom about a group of misfits who form a study group at a community college.

100 Questions rounds out the network’s new scripted programming. The series is about a woman searching for love online. She flashes back to previous relationships as she answers each of the 100 computability questions asked on a dating website.

The Office, 30 Rock, The Biggest Loser, The Celebrity Apprentice, Law & Order: Special Victims Unit, Friday Night Lights, Heroes, Southland, Parks and Recreation and Saturday Night Live Weekend Update Thursday will all be returning as well.

Though it feels like the finale started weeks ago given the way NBC has been hyping it, the official end to ER finally aired last night. After 15 years, County General closed its doors with no lack of pomp and circumstance. First, NBC aired an hour long retrospective of the show’s run with several of its stars, past and present, reminiscing about the it’s influence on the world and thier lives.

Following the retrospective, the 2 hour finale aired. It was a solid episode, with a great guest performance by Gilmore Girls’ Alexis Bledel as an intern, that left viewers in a satisfying place. They worked in the old school cast pretty well too, like in the Clooney episode that aired a couple weeks ago, there was a purpose for each of the character’s return, they didn’t just randomly appear like is often the in series finales. The premise of the episode is that Dr. Carter (Noah Wyle) is opening a clinic that will help hundreds of people and  Susan Lewis (Sherry Stringfield), Peter Benton (Eriq La Salle) and Kerry Weaver (Laura Innes), who are all still in Chicago, come to the opening to support his latest venture.  Rachel Greene (Hallee Hirsh), daughter of the late Dr. Green, comes back to apply for the medical program at the hospital as she is entering medical school, of course, Alex Kingston (Elizabeth Corday), her stepmother, was escorting her. They all get together after the opening for an emotional reunion, a nice moment for long time fans of the show.

The new cast wrapped up their story lines nicely too as Archie proves he is a leader and Sam proves she can handle the work/family balance after all. The final scene was reminiscent of the very first episode of the show (original theme music and all) as ambulances pulled in and the staff prepared to treat the victims of an explosion, showing life goes on. Dr. Carter was there as well, pulling on scrubs, ready to help another trauma victim. A fitting end considering when the show began, Carter was an inexperienced intern, now we see him as a confident doctor.

If you missed the episode, you can check it out at Hulu.com.

Yesterday, we took a look at the mid-season premieres ABC has lined-up this month. Here’s a look at what we can expect from NBC.

Southland is a new cop drama about Ben Sherman (Ben McKenzie), a rookie cop who’s being shown the ropes by his partner, John Cooper (Michael Cudlitz). The young cop struggles with the cost that comes with his new profession, like the difficulty he has with shooting a man dead on his first day. The show has a perfect time slot, it will take over ER’s Thrusday night position on April 9th, which is fitting since its executive producer, John Wells, was also the executive producer of ER.

Amy Poehler’s much hyped new show, Parks and Recreation also premieres on April 9th. Parks and Recreation is a mockumnetary about a local government public works office brought to you by the same folks who are running The Office. Critics love it, positioning Poehler to be the next Tina Fey, but hopefully Amy will have better luck finding an audience than her friend Tina has had with 30 Rock.

NBC’s third mid-season show is their biggest gamble. Kings premiered last night to so-so ratings. The epic drama is set in an alternate-universe monarchy in which a peasant prince is groomed to become the king. Fans of epic tales, like Battlestar Galactica, will most likely love Kings but the rest of us will probably pass it by.

Fox is premiering yest another prime-time animated series, Sit Down, Shut Up, about a high school as seen through the eyes of the demented teachers and administrators who run it. The twist in Sit Down, Shut Up is that the characters are animated but the background is live action. Even if that doesn’t sound appealing, The stellar cast makes up for it. Jason Bateman, Will Arnett, Kristin Chenoweth, Cheri Oteri, and Tom Kenny all provide voices.

Zap2it.com reports that tonight is definitely the night George Clooney returns to ER. They claim that NBC.com teased the episode themselves saying that tonight’s episode includes, “special guest stars Susan Sarandon, Noah Wyle, Eriq La Salle, Julianne Margulies (and the doctor Hathaway married).” When I checked the site a few minutes ago I couldn’t find such a statement but it wouldn’t be surprising since Julianne Marguiles is returning as Nurse Hathaway, Dr. Ross’ wife on the show.

Clooney’s Dr Ross originally left the ER after helping a woman euthanize her son. Dr. Ross then moved to Seattle only to be followed a year later by Margulies’ Nurse Hathaway who was pregnant with their twin girls. Of course George was really leaving to pursue a movie career, a risky move, but one that obviously paid off.

Here’s how it will all come together tonight: Sarandon plays the mother of a boy who is left brain-dead after an accident. Margulies is the one who has to tell her. La Salle bumps into Dr. Carter as he is waiting for his transplant. It’s not clear how Clooney fits into this or how it all ties together but, if nothing else, it will be exciting for fans to see Dr. Ross again.

NBC keeps the Clooney bonanza going with a special report on Sunday’s Nightline where he’ll sit down with Ann Curry on the Chad/Sudan border to discuss Genocide and what he thinks the Obama Administration should do about it.