Two things: First you pitch them an idea that you want to do. Once they say they like the direction you are going, there is a lot of creative freedom, so they let you write it. They send you a list of people they have interviewed as guests. They have already done the interviews. They have the voice of Space Ghost ask a bunch of questions and they have a bunch of responses. You can pick your guest and see if it works within the premise of your show then you get to re-write the questions.