Episode 63 of "Will and Grace"
s03e17 Cheaters, the conclusion
Title: Cheaters, the conclusion
Original Air Date: 02/22/2001 on NBC
Plot Outline:
Grace is apoplectic when she catches Will's philandering father on the arm of a glamorous stranger, but she gets even more worked up when she tells Will -- and he's happy living with denial. Speaking of cheaters, Karen misunderstands Grace and suddenly suspects that her husband Stan is having an affair, so she sets out to even the score.
