Drs. Callie Torres and Erica Hahn kiss passionately on the fourth season finale of Grey's Anatomy, entitled "Freedom." What a scene!

A photo from the May 1, 2008 episode of Grey's Anatomy, entitled "Piece of My Heart." Dr. Addison Montgomery (Kate Walsh) is back at Seattle Grace and talking to her old friend, Callie Torres (Sara Ramirez)!

Here's one of our favorite pictures of Callie Torres.

Meredith, Callie and Izzie try to shelter themselves from the wreckage as a bad situation soon gets a lot worse in "Crash Into Me, Part I," originally airing November 22, 2007.

Callie, Meredith, Cristina, Izzie and Miranda prepare for action as an ambulance crash threatens the lives of many right on the premises of Seattle Grace.

Unfortunately, for him, Alex Karev that is, Callie Torres is calling the shots. You would never have guessed it but he finds himself missing Dr. Bailey.

Alex and Callie talk to their patient, unaware that he is about to eat everything in sight. But what are you gonna do.

George and Callie kiss. Are these two going to be back on a normal playing field with Izzie out of the romantic picture?

They do their thing, as always! Mark, Izzie and Callie tend to a patient played by guest star Ben Vereen in an early Season Four episode of "Grey's Anatomy."

The Season Four cast of Grey's Anatomy: Starring the lovely Ellen Pompeo (Meredith Grey), Patrick Dempsey (Derek Shepherd), Sandra Oh (Cristina Yang), Katherine Heigl (Izzie Stevens), T.R. Knight (George O’Malley), Justin Chambers (Alex Karev), Chandra Wilson (Miranda Bailey), James Pickens, Jr. (Richard Webber), Sara Ramirez (Callie Torres), Eric Dane (Mark Sloan) and Chyler Leigh (Lexie Grey).

Both have big days in the season finale.

Dr. & Mrs. O'Malley is starting to get wise.