Too Close for Comfort (1980)

Season 2: Episode 13

April secretly arranges for her father Bill to meet face to face with his brother Henry, so they can attempt to reconcile after a petty childhood dispute caused them to stop speaking forty years ago. The effort may be for naught, however, when Bill eats a piece of cheesecake baked by Monroe, who did not realize it was an old Russian recipe for homemade poisoned rat bait.