I think you can imagine everyone has ankle weights on, or technology, and there's a reason that people aren't floating around. But I also liked this idea that in this world, people forgot they can swim. The modern world weighs you down, there's always emails to check, you've gotta go to your job and pay your mortgage. You're not really thinking, "Oh, yeah, I can swim around." BoJack discovering it is a big deal, and kind of fun.

We often ask, "Do we have enough humans?" Because it's always fun to come up with an animal in show, but it begins to feel like overkill.

'Lost in Translation' movie says something interesting about the alienation of being a stranger in a strange land, but also of being a celebrity. That kind of feeling of not being in the same strata as everyone else.

It's a fun show, BoJack Horseman to do, and that gets around. It's easy, especially for a lot of actors who don't do a lot of voiceover. No makeup, no wardrobe, they really just come in, the lines are right there, we goof around for a half hour, and I think it feels like, "Oh, yeah, this is why I got into this business: to play around and have some fun." There's no paparazzi, most of them don't do any promotion for the show. it's the fun part of acting, without the other stuff.

Daniel Radcliffe was actually a fan of the show and excited to be on it. Some of it is we've gone long enough that we're legitimate. Even if they don't know the show, they know we are a show and not some weird thing that's going to go away. Also, the more celebrities we get on BoJack show, the more it feels like a club to be in: "If Naomi Watts will make a fool of herself, I guess I can make a fool of myself, too."

I want each season to feel new and special. I don't want it to feel, "Oh, more of this." That's something that's easy to do in the first three seasons, and harder to do as you go. I'd rather err on the side of blowing up everything and being like, "Why did you do that? There was more story to tell there," and moving the family to Mexico like on Weeds, instead of people going, "Oh, we've seen this already. We're tired of this."

It's really cool to get these guests on the show BoJack Horseman: not just actors, but, "Can I get Jonathan Lethem on my weird talking horse cartoon show to talk about how growing up in Brooklyn, he always dreamed of being a ringtone?"