Tonight's Fall Premieres: 'Dancing with the Stars,' 'HIMYM,' 'Two and a Half Men,' '2 Broke Girls' and More!

Here it is, the big week: all of the major networks start bringing out the big guns and premiering their best and brightest shows, while introducing some new potential hits to us. The CW has already premiered most of its stuff, but Fox, NBC, CBS and ABC have only released a few shows, if any, thus far.

Check out all of tonight's big premieres:

8:00 PM

Dancing with the Stars (ABC)

It's back! Though this year's cast is for the most part pretty uninspired (when David Arquette and Kristin Cavallari are your biggest names, you're in trouble), there's at least Chaz Bono. The transgendered Bono has already been causing an uproar in the media and among fans, some of whom support him and others of whom...well, you know how some people can be. Hopefully Bono can dance and he'll stick around.

Watch a preview of the premiere of "Dancing with the Stars"

How I Met Your Mother (CBS)

The gang is back and, after last season's cliffhanger ending, things might be a bit topsy-turvy. In "Challenge Accepted," we were left wondering exactly whose wedding we were at...and it looked like it was Barney's. Could that possibly be true? If so, how will the show survive without Barney's usual antics? I'm sure "HIMYM" has a trick or two up its sleeves.

Watch the clip below, but beware of spoilers...this may or may not reveal the answers to the cliffhanger questions!

Watch a preview of the premiere of "How I Met Your Mother"

The Sing Off (NBC)

We saw a few premieres from NBC last week, including the return of "Parenthood" and the premieres of the brand-new "Free Agents" and "Up All Night." This is NBC's true premiere week, though, and it kicks off with the return of "The Sing Off." A new collection of a capella groups take the stage and attempt to win over the panel of judges, which this year includes musician Sara Bareilles.

Watch a preview of the premiere of "The Sing Off"

9:00 PM

Two and a Half Men (CBS)

This long-running sitcom might be the most buzzed-about returning show of the fall season, and it's all thanks to Charlie Sheen, who isn't even on the show anymore. Expect to see Charlie's funeral on this first episode, and watch Ashton Kutcher take over as the new leading man.

We'll have to see if the change hurts the show in the long run, but you can bet that the premiere will be a big one. Those who have never watched the show before are certainly aware of it now, and might tune in out of curiosity. Plus, we just heard a contrite Charlie Sheen give an apology and show his support for the show on last night's Emmy Awards telecast, so that could pique some curiosity as well.

Watch a preview of the premiere of "Two and a Half Men"

9:30 PM

2 Broke Girls (CBS)

It's a bit surprising to see Kat Dennings on a TV show, considering the success she's had recently in movies (she was in "Thor," for pete's sake!). But I'm not complaining: Dennings is a funny actress, has the quirks to work in a sitcom, and is pretty easy on the eyes, too.

The premise is pretty simple: Dennings is a career waitress who is joined at her job by a formerly wealthy heiress who has been cut off by her parents (think Paris Hilton if she was disowned). Hilarity ensues, at least it does if early word of mouth can be trusted...so far, feedback for the show has been positive.

Watch a preview of the premiere of "2 Broke Girls"

10:00 PM

Castle (ABC)

Nathan Fillion is back as Rick Castle, the crime novelist with a bit of a crush on detective Beckett, whom he shadows for research for his books (and for witty banter and flirting, of course). A talented cast supports this addictive show, which is about to get pretty serious if the following preview is any indication.

Watch a preview of the premiere of "Castle"

Hawaii Five-O (CBS)

Book 'em, Danno! The surfing, crime-solving, bikini-laden procedural returns to CBS for its second season tonight. There are already some great names on the show (including Scott Caan, Grace Park, and Daniel Dae Kim), but this season they'll be joined by "Lost" alum Terry O'Quinn. I can pretty much guarantee he won't be turning into a smoke monster.

Watch a preview of the premiere of "Hawaii FiveO"

The Playboy Club (NBC)

It's tough to say what's going to happen with this one. The show, which centers on the Playboy Club in its heyday back in the 1960's, has received lots of publicity, in part because some more conservative NBC affiliates refuse to carry it. It's also gotten some buzz for not being all that good. But that's for you to decide yourself: tune in tonight and find out if this is just a "Mad Men" knock-off, or the new addictive show on NBC.

Watch a preview of the premiere of "The Playboy Club"