The divorce between Gabrielle and Carlos reaches new levels of bitterness. Susan is determined to jog Mike's memory, and realizes Edie has been posing as his girlfriend since he woke up. Tom decides that his dream is to open a pizza parlor, and Lynette is not delighted. Bree tries to break up Danielle and her history teacher, who's been having an affair with her. Meanwhile, Mike's phone number is discovered on a dead woman's body.

Gabrielle takes a shot at training potential young beauty queens. After discovering a wall of photos of half-naked boys in his basement, Lynette is convinced her new neighbor Art is a pedophile. Susan stays at Ian's house and clashes with his butler. Carlos asks Mike if he could stay with him for a while. With his mother living in the Hodge house temporarily, another part of Orson's past is revealed.

Susan meets her in-laws and finds out some family. Victor is still taking his chances with Gabrielle, while she has a devastating catastrophe at her home. Lynette is encountering new problems at the pizzeria while an unexpected relationship develops on Wisteria Lane.

This is the show's first Halloween episode. Edie Britt's biggest fear comes true when Carlos walks out on their relationship. Susan finds Mike's father, who was supposedly dead. Danielle goes into labor right in the middle of the Halloween party... and somebody has to deliver the baby.

Bree and Katherine decide to start a catering business together. Lynette tries to deny her feelings for Rick. Mike learns the truth about his nearly fatal accident. Carlos gets a seeing-eye dog. Dylan meets her estranged father.