Will (Eric McCormack) discovers a way to finally get back at Jack (Sean Hayes) for years of relentlessly mocking his hairline. Grace (Debra Messing) is determined to prove to Mrs. Timmer (guest star Livia Trevio) she's strong enough to handle the challenges of being a single mother. Karen (Megan Mullally) gets an invite to Stan's old poker game, and squares off against Stanley's brother, Danley Walker (guest star Patton Oswalt).