Richard Livingston

Will (Eric McCormack) and Jack (Sean Hayes) can't wait to arrive at the house of two old friends (guest stars Jerry Levine, Tim Bagley) who are known for their wild parties but they discover that the former party animals are now sedately raising an adopted baby girl - and Will shocks Jack when he volunteers to test his shaky parenting skills by babysitting her for them. Elsewhere at a snooty yacht club, Grace (Debra Messing) believes that Karen (Megan Mullally) is jealous of her romantic relationship with Ben (guest star Gregory Hines) but then later regrets taunting her.

JD (Zach Braff) is riding high after correcting a misdiagnosis by Dr. Cox (John C. McGinley), but is jerked back to reality when he is unable to explain the death of his next patient. Meanwhile Elliot (Sarah Chalke) is struggling personally and professionally as she is forced to relinquish all of the luxuries that her father had been financing -- including her apartment -- and a malpractice suit is brought against her by a patient (guest star Alan Ruck, "Spin City") for saving his life. Carla (Judy Reyes) learns that sometimes it is better to keep her opinions to herself when the fallout of a conversation with Dr. Cox about his relationship with his ex-wife lands Jordan (guest star Christa Miller) in the hospital. Donald Faison, Ken Jenkins and Neil Flynn also star.

Jerry joins a tennis club where the pro is a lousy player; George is too late in concocting a witty comeback to an insult.

An imposter claims to be Jack's son.