A pet lion on the loose gives the hospital some fierce injuries to deal with. Meanwhile, Cristina continues to ignore Owen, Lexie reconsiders her feelings for Mark, Callie has to face Arizona's romantic past with other hospital staff, and Alex starts to feel uncomfortable about his relationship with Morgan.
Stars: Ellen Pompeo, Sandra Oh, Justin Chambers
Director(s): Mark Jackson
Writer(s): Shonda Rhimes, Stacy McKee