Lisa Bonos chats with novelist J. Courtney Sullivan about the single woman who sold Americans on the idea that a diamond is forever; Jon Mervis discusses what it's like to sell engagement rings; and we meet a couple who got engaged without a ring.
As matchmaker Christina Antoniades and reporter Michelle Leiby prepare to retire from Datelab, they look back on the 550 couples they've set up, revealing their favorite pairings and what they've learned about love.