Season 6 Ep 1

[cuddylicious]

 Possible spoiler ahead, that is, if the source is accurate... Freelancer__ who claims to be a writer for House MD (no idea whether this is true, I lean toward "yes"), tweets:

I'm not giving any details, but I will say that Cuddy goes to see him at Wilson's. about 6 hours ago from web
And we already know from Ausiello that House returns from the mental institution to live with Wilson.