There's no traditional three act structure - or beginning, middle and end - to a family tree. By its nature, it has almost infinite different branches, or episodes, to explore in every direction.
Chris O'Dowd is a very special talent. He's one of those very, very rare actors who can be the clown, or he can be the straight man playing off the clown, in a scene.
I'm an old school actor in the sense. More and more now, I play myself as I get older. Even as a writer, I never got typecast. I've always bounced from project to project or initiated my own things.