This is the typical late-series dull-plot we-don't-much-care-anymore acting you'd expect of the end of a series - though Sebastian Cabot plays his role (as French the butler) well as always and Brian Keith as Uncle Bill delivers his usual wooden performance. (I guess he enjoyed playing the role but I can't fathom why. I think he did like the kids, on a personal level.) The kids, especially Anissa Jones (Buffy) are straight out of a minimally-rehearsed grade-school play. And here at the end of the series we still and yet again see that Buffy has Mrs. Beasley in bed with her. (That's her spectacled old-lady doll.) We have appearances by a token slightly-hispanic kid and his father to show how broad-minded we are.
Really, mostly just one thing is worth seeing - Uncle Bill Davis down at the downtown Manhattan 'junkyard' (replete with what, one old car?) in a blue suit that is so bright it looks like it's lit up electrically, perhaps neon. My flat screen drew extra wattage when appeared at the 'junkyard' in that suit. I think it burned the screen. Yow!
Honestly, if they'd have adjusted the plot lines and let the kids grow up some instead of being like backwards 7 year olds for the whole series, it would have been a much better show. They had all the ingredients except for decent scripts. Well maybe Anissa Jones could be replaced, or maybe she'd have done a better job if she didn't hate her role by that time.
I can see Family Affair having been a very different and deeper show had the dramatic subplots not been as lightweight and juvenile as the attempts at comedy. The guy who supplied the laugh track probably dozed off during the job because nothing funny, really was.
Tell the show it's dead.