Shaw returns to threaten everything that Chuck holds dear as his friends, family and the woman he loves are all put in mortal danger. Chuck has to find Shaw and stop him before his own world gets torn apart.

Chuck and Morgan go on a rogue globe-spanning mission to find Chuck’s mom. Meanwhile, Sarah and Casey follow a trail to Russia as they investigate the mysterious Volkoff Industries and its operative, Marco. Back at home, Ellie delivers big news to her family.

When Colonel Casey's former team returns looking for him, Chuck must decide what he's willing to sacrifice in order to find his mom. Elsewhere, Morgan works up the nerve to reveal a potentially dangerous secret to Casey.