I was thinking of how awkward Cliff was in Dallas but actually he wasn't like that so much in the early seasons. As Dallas went on, Cliff became that way. He developed some goofy mannerisms. Do you think that was just how Ken Kercheval decided he wanted to play that character because he thought it was funny, or was he specifically told to do that? Other characters changed over time too in various ways. It seems like the actors did have some control over that but I wonder how much latitude they were given. Hagman claims he ad libbed 50% of his lines. He had a lot of control over his character. Apparently it was his decision to take J.R. in the direction his character went over the course of the serious. JR was very competent and successful when the show was at its most successful. The less competent and successful JR became, so went the entire show. It's pretty close to a direct correlation. You'd think Larry Hagman would have noticed that and corrected that mistake, wouldn't you? Even if he didn't I'd especially think his boss would have noticed it. Or was he given so much power that he basically didn't have a boss? I'd estimate the amount of creative control they had over their characters was probably related to their status - the highest paid actors had the most creative control. I don't agree with that policy though. Just because someone is a good actor doesn't necessarily mean he knows what is in the best interest for the success of the show.