After partridge's grisly death, 2 ideas struck me.

1. What if it's just a hallucination?

Patrick was sectioned, maybe the whole series is a mindf*ck? Maybe he never had a family, none of these people are real, and it's all playing out as some weird delusion.

2. Murder, He wrote.

Or it's all one big trip, RJ is revealed, and then it cuts away to Bruno Heller with a typewriter, calling a publisher to say he's finished his latest book? I Know CBS currently airs Castle, but really, even if it's revealed like that, there's barely any similarity. Castle deals with cases based on his books, this could just be fiction created by a fictitious version of Bruno H. 

Would be a great way to further anger us fans, who've been convinced it's Partridge for 5 bloody years.