Conan O'Brien will guest star on Season 4, according to Will Arnett, who broke the news Tuesday night on -- you guessed it -- Conan.
Tobias Fünke's David Cross sat for Rolling Stone and offered up all sorts of tidbits, including the best bombshell ever:
I think it's going to be 13 episodes, not 10. There's too much story. Some characters will have two-parters. Everybody sort of participates, sometimes in a bigger way and sometimes in a tiny little thread that goes through everybody else's stories.
I'm not gonna divulge anything, but I know what the stories are and what Mitch [Hurwitz] is doing, and it's so layered. ... I know what he's doing, and this has never been done on a TV show like this. This makes Lost look like a Spaulding Gray monologue. You'll have to watch each episode more than once.