Strangely, I agree with everything that has been said so far. This really was a different kind of television show. Great cast with an impossibly hot Margot Kidder and excellent stories, I especially remember one about a madcap treasure hunt that had so many twists, turns and reversals that it quite rightly turned out to be a dream. And just to prove I've been there: as already reported the last episode killed off the Nichols character and replaced him with his brother the only difference between the two being the new brother's full on black mustache. The whole episode the brother seesaws about whether or not he'll stay and take over for his dead brother. Finally he goes to the barber shop and looks at his mustache in the mirror, putting his hand over it as if to visualize what he would like like without it (i.e., take over for his dead brother and keep the series going).
"Naw", he says and leaves the town of Nichols ending the show.
"Naw", he says and leaves the town of Nichols ending the show.