All in the Family S09E18 - Barney, the Gold Digger

Archie finds himself in the middle of a bad situation when a suicidal Barney calls him to announce that Blanche has run off again, this time with the furnace repairman. Archie concludes that Barney needs a new woman in his life, and sets him up with Edith's rich widowed, albeit obese, friend.