"Chuck" is going to Milan next week and Karolina Kurkova is gonna get naked. Chuck and Sarah go undercover in Milan to attend Fashion Week and investigate a high-tech weapon. There will be a scene of Kurkova coming out of the shower, holding a gun to Chuck's temple and involving herself in what creator Chris Fedak said one of the "best fights yet".
During the mission, Chuck realizes the "Achilles' Heel" in his and Sarah's relationship, but must set personal issues aside for the mission. In Milan as well, Chuck meets Bronson Pinchot's Victor, a tacky and audacious wannabe-matchmaker. Meanwhile, Morgan recognizes a fatal flaw that compromises the new Buy More. Elsewhere, Casey struggles to put down roots in Burbank.
The preview which NBC has just released at the end of season 4 premiere is not only giving away sneak peeks to the September 27 episode but also several episodes after that, including the time when Chuck and Sarah finally meet his mother.