As Time Goes By (1992)

Season 10: Episode 1

Jean feathers the nest for grandchildren, even though Lionel points out that neither Judy nor Sandy have gotten pregnant yet. It turns out that Judy and Alistair have been trying, with no results, and Judy suspects the problem may be Alistair--who is wildly overcompensating to prove his virility. Meanwhile, Sandy is upset because Harry seeks a promotion that may put him in harm's way. And in the middle of all this, Lionel gets a very unexpected visitor from Africa.