What is the title of the House M.D. episode in which House imagines a bus crash?

The House M.D. episode in which House imagines a bus crash is titled “House’s Head.”

“House’s Head” is the first part of a two-episode story from the show’s fourth season. House wakes after an apparent night of drinking and cannot remember important events, including what happened before he was injured. He believes a fellow passenger on a bus was suffering from a dangerous illness, so he attempts to reconstruct his fragmented memory.

The episode uses hallucinations, visual clues, and unreliable recollection to place the audience inside House’s investigation. His search is not simply about identifying a diagnosis; he is also trying to locate the missing patient before the condition becomes fatal. The story concludes with a major unresolved question that continues in “Wilson’s Heart.”

The episode aired in 2008 and was written by Peter Blake and David Shore. Its title refers to House’s effort to search his own mind for evidence. The follow-up episode focuses on the consequences of the discovery made at the end.