What was the title of House M.D.'s two-part episode featuring Amber Volakis's death?

House M.D.'s two-part story featuring Amber Volakis's death is titled “House's Head” and “Wilson's Heart.”

The story begins with House suffering from a severe head injury and trying to reconstruct events from a night he cannot remember. His missing memories become crucial because Amber is critically ill after being involved in an accident connected to House.

The second episode focuses on the medical effort to understand Amber's condition and the emotional consequences for James Wilson, who is in a relationship with her. The two episodes connect a mystery-of-the-week structure with an important development in House and Wilson's friendship.

The titles are sometimes treated as one episode, but they are separate installments: “House's Head” is the first part and “Wilson's Heart” is the second. Both aired during the show's fourth season.