It's Valentine's Day, and the doctors must treat dozens of injured people after the roof collapses at a popular romantic restaurant. From the look of the preview, Derek and Meredith are going on a double date with Owen and Cristina when they see the collapsed restaurant.
Meanwhile, Derek tries to manage his busy schedule as Chief of Surgery and Meredith wrestles with her new duties as the Chief's wife. Mark and Callie team up to convince Sloan to do the right thing for her baby. "Valentine's Day Massacre" will air on Thursday, February 11.
On another "Grey's Anatomy" news, Michael Ausiello of EW reported that the February 18 episode will trace back Alex's past romance. In fact, one of the female doctors at Seattle Grace once hooked up with him and her identity will be revealed in the episode which is called "The Time Warp".