I am building one currently. I got the general concept in my head then I start by putting it on story boards so I can see it on paper and how it fits together. I put dialog in there as well. I work on it a little bit here and there. It looks like a cheesy comic book right now. I plan to take the pics based on the sketches. This would be my first when its finished.

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Klink: Schultz! Where is that radio?
Schultz: They didn't tell me!
Klink: Find it at once!
Schultz: Jawohl, Herr Kommandant.
Klink: Hogan! Where does that voice come from?
Hogan: From the accent, I'd say England.
Hogan's Heroes" (1965)