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Rob (Dick Van Dyke) is in a pickle when one of the "Alan Brady Show" dancers, 18-year-old Joan Delroy (Cheryl Holdridge), develops a crush on him. Although Laura (Mary Tyler Moore) finds the whole thing amusing, Rob can't see the humor in it. Not only is he old enough to be Joan's "father...er, older brother...er, younger father," but her incessant fawning is getting in the way of his work. In desperation, Rob tries to scare off Joan by pretending to be a "wolf" -- whereupon Joan's hotheaded boyfriend Ernie (Jimmy Murphy) takes retribution!