The House M.D. episode in which House loses his memory after a bus accident is titled “House’s Head.”
This season-four episode follows Gregory House as he tries to reconstruct events after waking with a head injury and incomplete memories. He believes an important clue about a patient is hidden in his recollection of the night before, so he searches through fragmented images and conversations.
“House’s Head” is the first part of a two-part story and ends with House identifying the patient he must save. The conclusion appears in “Wilson’s Heart,” which completes the medical mystery and reveals the emotional consequences of the accident.
The episode is sometimes confused with “Wilson’s Heart” because the two stories are broadcast as a pair. However, “House’s Head” focuses on House’s damaged memory and investigation, while “Wilson’s Heart” provides the second half of the narrative.