Mr. & Mrs. North - 1x14 - On the Rocks- Followmy.tv

The Norths spend the weekend at the country estate of a successful writer Jerry's trying to lure to his firm. The party turns ugly when despised rival publisher Ned Waters shows up. His soused wife quickly downs her husband's drink and promptly falls over dead of poisoning. Any one of the group had motive to want Ned Walters dead.