Favorite Comic-Con 2012 Posters

The Observers are coming to the final season of Fringe. Consider yourselves warned, fans.

A photo of Elisabeth Reaser, best known to Grey's Anatomy fans as Jane Doe (or later, Rebecca Pope). She's a good actress and is coming back for at least part of Season 4.

A Season 3 guest star.

A picture of Lauren Stamile, the new guest star and love interest of Derek Shepherd (Patrick Dempsey) on the fourth season of Grey's Anatomy. Will see be a thorn in the side of MerDer?

The former Dawson's Creek star is reportedly coming to Grey's Anatomy in Season 4. We are looking forward to seeing with Joshua Jackson has to offer.

The Emmy-nominated actress who plays Meredith's mother, Ellis.

Lil Rounds? Huge voice! This American Idol contestant received a standing ovation for judges after her rendition of "I Will Always Love You."

Kyle Chandler got the starring role on this show after appearing on Grey's Anatomy.

Seth Green is set to guest star on Grey's Anatomy in Season Four. The oddball comic actor does voices for Family Guy and has starred in flicks such as Can't Hardly Wait and the Austin Powers trilogy.

Ron Melendez of "General Hospital" fame will be coming to Grey's Anatomy as a guest star in Season Four. We're looking forward to it already.

Will new guest star Chyler Leigh mean more friction between Derek and Meredith.

The pregnant "Jane Doe" introduced in "Walk On Water."