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 is preparing to go to Paris with Ian.

All of Wisteria Lane gathers at Pizzeria Scavo for the grand opening event, while one resident meets an untimely fate and another accepts a marriage proposal.

As Gabrielle prepares for her fairy tale wedding, Bree returns to Fairview with a surprise. Meanwhile, Lynette's mother Stella pays her a visit after finding out Lynette has cancer. Finally, Susan and Mike tie the knot in an unexpected location.

A mysterious stalker from Adam's past shows up on Wisteria Lane, and they have dinner. Detectives question Gabrielle about Victor's whereabouts. Danielle's baby puts stress on Bree and Orson's marriage. Lynette has a reunion with her long-lost stepfather, Glen. Susan notices Mike is behaving strangely.

Bree's estranged daughter, Danielle, returns to Wisteria Lane and is met with a deluge of criticism. Meanwhile, Gabrielle and Susan find themselves embroiled in a catfight brought on by an altercation between their kids. To her chagrin, Lynette comes home to find Tom and Dave have formed a garage band after she told him to get rid of his old things. Finally, Katherine and Mrs. McCluskey invite Edie to lunch to press her for more information on Dave.

Susan turns up the heat for Mike, Bree learns it won't be easy to undo the hurt she's caused Orson, Lynette discovers Tom's true intentions, and Gaby is forced to examine feelings she's suppressed about her heritage.

A progressive dinner party thrown for Susan to celebrate her move back onto the lane leads to a shocking murder. Meanwhile, Gaby is stunned to learn the identity of the mysterious man who has been stalking her; Lynette and Tom attempt to put the spark back into their marriage by spending a few days alone together at a romantic Bed & Breakfast; after being placed under arrest for allegedly poisoning Paul, Susan must convince the police that she was being framed for the deed by Felicia; Bree begins to suspect that her new boyfriend may be gay.