"Grey's Anatomy"'s Seattle Grace Hospital is back in action: When Izzzy (Katherine Heigl) tries to talk to Alex (Justin Chambers), he immediately thinks she is trying to break up with him, so when she admits she sees dead people (Denny, Jeffrey Dean Morgan) he is relieved and tells her to say hi!

Then a death row inmate (Eric Stoltz) is admitted, which angers Derek (Patrick Dempsey) and causes the rift between Meredith (Ellen Pompeo) and Cristina (Sandra Oh) to deepen.

In the meantime, Callie (Sara Ramirez) and Mark Sloan (Eric Dane) create their own recovery program to fight their inappropriate attractions to members of the opposite/same sex, and Dr. Bailey (Chandra Wilson) teams up with Seattle Grace's new pediatric surgeon, Dr. Arizona Robbins (Jessica Capshaw) to save a young patient.

The "Wish You Were Here" episode of "Grey's Anatomy" airs Thursday, Jan. 8 at 9 p.m.