After a rape victim identifies her rapist, Grissom and his team struggle to find the physical evidence to convict the perpetrator when it points in a different direction.
Dr Benton and Dr Morgenstern clash after a complicated operation goes wrong. Meanwhile, Dr Del Amico is found to be a potential match for a bone marrow transplant patient.
Greased Lightning hits McKinley on the opening night of the musical. Santana, Rachel and Kurt return to Lima for the occasion, while Kitty steps up her vendetta against Marley.
Valens helps Rush search for her abducted sister; Jeffries tries to close a case that has haunted him for 17 years.
Amy grows tired of her humiliation at Abaddonn and is jealous of Krista's good fortune. She considers taking a more socially responsible job at a homeless shelter.