By the showÂ's third year ratings were high enough to give the writers and creators more leverage with the network and thus a bit less trouble with the censors. In addition, the showÂ's writers were more experienced with the TV format and had more in-depth knowledge of the characters. By this time they could also gauge how much serious material the audience would accept mixed in with their comedy.
But most importantly, between the second and third seasons Larry Gelbart and Gene Reynolds visited Korea, a trip that they say affected the stories in the third season.
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