Se04e01 Alone
Season 4 Episode 1
When an office building collapses, House has to work fast to diagnose a young woman, Megan, who survives the disaster. House, without team, talks through his ideas with a janitor at Princeton-Plainsboro and as he persists in diagnosing Megan by himself, he realizes the case is not what it appears, and that solitude may not be the answer.