Shenita Moore

Derek and Meredith try (unsuccessfully) to be discreet as they spend the night together at Meredith's house, but their haggard appearance speaks volumes to everyone - including Bailey, who warns Meredith to end the relationship. Meanwhile George suspects an anesthesiologist of drinking on the job but is reluctant to speak up about it, Alex treats a former schoolmate who finds honor in self-mutilation, Izzie's boyfriend takes extreme measures in order for them to spend more time together, and Cristina seems to be battling a case of the flu.

When a series of deaths occur at Seattle Grace, the uncanny events bring out the doctors' superstitious sides and make Izzie nervous about Denny's surgery. Meanwhile, Derek and Addison discuss making a more permanent living arrangement, and Richard treats a very special, old friend.

"Grey's Anatomy's" three-episode story arc continues with a part two that will challenge the interns of Seattle Grace -- and "Grey's" fans as well -- like never before.

When Abishola’s husband, Tayo (guest star Dayo Ade), makes a surprise visit from Nigeria to Detroit, Bob sees this as a perfect opportunity for Abishola to ask for a divorce, but Abishola is surprised when past feelings for her husband arise.

While investigating the homicide of an overzealous journalism student, Jane is not happy when a former colleague (recurring guest star AMAURY NOLASCO – Prison Break) returns to the Boston Police Department as the new lieutenant of the drug unit. But the murder Jane is investigating soon forces her to deal with him — and the event in the past that wrecked their relationship. Meanwhile, an alarming tip from Cailin (recurring guest star EMILEE WALLACE) causes Maura to investigate Hope (recurring guest star SHARON LAWRENCE).