Fall marks the back-to-school season and cooler temperatures. It also means the return of your favorite -- along with a slew of new -- TV shows!

With so many channels, how do you know what to watch? And when it's on? And what's worth your time?! Well fear not. Your friends at toofab are here to guide you in the important TV decision-making process, starting with our Must-See Fall Shows!

We are definitely excited to check out Britney Spears as a judge on "The X Factor" this Wednesday. She'll either crash or be a smash, and we'll be watching every minute. Other returning favorites: "Dexter" and "The Walking Dead." They're two of the dark dramas that we can't get enough of!

On the new series side, our staffers are really excited about "666 Park Avenue," a supernatural thriller starring Vanessa Williams and Terry O'Quinn (Locke from "Lost"!) and "Nashville," a musical drama about a fading country star -- the ever-amazing Connie Britton -- and her younger competition, Hayden Panettiere.

As for comedies, we love former "Office" star Mindy Kaling and are rooting for "The Mindy Project," in which she stars as a doctor looking for love.

And that's just the tip of the iceberg. Click "Launch Gallery" above to see all of our picks for Must-See Fall TV, and click here to download your own copy of the complete toofab Fall TV calendar! You'll thank us later.

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