When Chuck go undercover in Milan, Chuck realizes the "Achilles' Heel" in their relationship, but must set personal issues aside for the mission. Meanwhile, Morgan recognizes a fatal flaw that compromises the new Buy More. Elsewhere, Casey struggles to put down roots in Burbank.
Elenco: Zachary Levi , Yvonne Strahovski , Adam Baldwin , Bonita Friedericy , Brandon Routh , Joshua Gomez , Julia Ling , Linda Hamilton , Mark Christopher Lawrence , Matthew Bomer , Mekenna Melvin , Ryan McPartlin , Sarah Lancaster , Scott Krinsky , Vik Sahay .