Fred Astaire and Ginger Chicken

S6, E20: Smitten with his new boyfriend Vince (guest star Bobby Cannavale "Kingpin"), Will (Eric McCormack) puts his relationship to the test introducing him to the overly critical Grace (Debra Messing) for her approval. However, when Grace abruptly cuts the introduction short, Will is convinced of her disapproval of Vince and thus begins to question his own feelings. Meanwhile, Karen (Megan Mullally) drops a bombshell on Jack (Sean Hayes), revealing that after her upcoming wedding their friendship will be forever changed, forcing him to begin casting calls for her replacement.