Grace returns from her European travels a new woman, but her elation is short-lived when she receives life-changing news. Karen teaches Will how to be better at phone sex, and inadvertently helps him admit he wants a family with McCoy. Jack has a yard sale to discreetly get rid of Estefan's annoying cuckoo clock.

When Grace admits she's not sure who the father of her baby is, Karen orchestrates a Mamma Mia situation with the potential baby daddies. Will worries what will happen if he has a straight son, and enlists Jack to help him prepare.

Will discovers a way to finally get back at Jack for years of mocking his hairline. Grace is determined to prove to Mrs. Timmer she's strong enough to handle being a single mother. Karen squares off against Stan's brother in a poker game.

Will and Grace get competitive over whose process of having a baby is more difficult. Jack helps Karen prove that she?ll be a competent owner of her new baseball team. But Karen realizes that an old acquaintance may be the help she really needs.