Everyone's lives on Wisteria Lane are forever changed when Carolyn Bigsby holds shoppers hostage at a local supermarket. Meanwhile, Gabrielle and Carlos finish dividing their assets: Gabrielle gets the house, and Carlos gets everything in it.
Susan drunkenly professes her love for Ian, Gabrielle and Carlos try to rekindle their love after Gabrielle admits she still cares for him, Bree is confronted with Orson's past, and Nora and Lynette go to war.
The team investigate a mass murder at an internet security company, while Prentiss must complete recertification training under Morgan's supervision.
Beckett races to find a stolen toxin capable of killing thousands of people and Castle has less than 24 hours to live after being exposed to the chemical weapon.
The day has arrived for Cooper and Charlotte to marry, but not everyone is in a celebratory mood, leading the couple to second-guess their wedding plans.