Season 4 was the games to get the new team and ended with Wilson's GF dieing. Season 5 was mostly about dealing with Wilson's anger/House's grief for causing it then 5 episodes before the finale Kutner killed himself and House starts to get more addicted to Vicodin and then ends with him having that hallucination and going to Rehab. The actual Rehab episode(s) wasn't until the first two episodes of this season(6). While House is out, Foreman became the leader of the team, which caused Taub to quit and then Forman fired 13. House got Cameron+Chase back to help on the next case, then a few episodes gets back the rest of the team by nagging them to realize they want to work there again.
XI Wiki


