The CW is bringing a couple of TV Fanatic favorites back into our lives this fall. First, Rachel Bilson will portray a small-town doctor in Hart of Dixie.

Also, Sarah Michelle Gellar will take on her first starring role since Buffy the Vampire Slayer. She'll anchor the unique thriller Ringer, portraying a woman named Bridget who takes over her twin sister's identity in order to stave off trouble...

... only to discover that her sister, Siobhan, is also also in serious danger.

Sound complicated? Yes. Intriguing? Definitely. The series also stars Kristoffer Polaha, Ioan Gruffudd, Nestor Carbonell and Tara Summers. Check out a preview and two pilot episode sneak peeks below:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.