Episode 54 of "Will and Grace"
s03e08 Lows in the Mid-Eighties - Part 1
Title: Lows in the Mid-Eighties - Part 1
Original Air Date: 11/23/2000 on NBC
Plot Outline:
In a flashback to Thanksgiving 1985, coed Grace invites her college boyfriend Will home to meet her family, but their romantic relationship swerves dramatically when a conflicted Will phones a teenaged Jack for some crucial advice. Unfortunately, Will and an angry Grace end up temporarily estranged when he blurts out the truth and she orders him out of the house -- and her life.