"You're basically on set to help the production. You're helping the actors make it make sense, or maybe you wrote something that doesn't work in the production sense. Most of it is coming up with jokes."

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I did a guest shot on a comedy series where they did 20 to 30 takes of everything. It's just gone by then. The joke is over. It's not funny anymore, and then of course, the editor's the one that has to figure out the timing. I think a lot depends on that.

— Dick Van Dyke