Things come to a head between Kevin and Randall on the season finale of This Is Us. "Strangers: Part Two" is the 18th episode of the show's fourth season.
Kevin: Listen, I got to get into this meeting. But tomorrow is my one-year-sober. My one year sober is also Jack's birthday. Nicky: Oh. Kevin: I thought you might want to congratulate me. Nicky: I'll congratulate you tomorrow.