Halloween is a night of horrors for Edie, whose worst nightmares become reality when Carlos walks out of their relationship. Elsewhere, Susan finds Mike's father, even though he was supposed to be dead, and Danielle goes into labour right in the middle of the Halloween party, but who will deliver the baby?
The residents of Wisteria Lane begin to rebuild their lives after the deadly tornado. With Mrs McCluskey's house completely destroyed, Lynette faces the possibility that her family and Ida Greenberg may not have survived, and Katherine finds out that someone knows the truth about her mysterious past.
Edie is shocked when she receives some news at the gynaecologist's office and an unexpected visitor discovers Bree's pregnancy is a hoax.
The Wisteria Lane Neighbourhood Association leaps into action when they see the contemporary water sculpture that Bob and Lee have installed in their front garden. Elsewhere, Edie finds out about the affair that Carlos is having with Gaby, just as John Rowland - Carlos and Gaby's former gardener - turns up unexpectedly wanting to rekindle an old romance.
Bree reaps the success of her new book by treating herself to a new car, Lynette and Tom decide to sell his Mustang to help with their financial woes and Susan is determined to send MJ to the best school, even though she and Mike can't afford it. Meanwhile, Gaby joins Edie's no-nonsense bootcamp to get back into shape, and Lee struggles to decide if he should tell Lynette and Tom some disturbing facts about Dave.