Now You Know EPISODE 1
A month has passed on Wisteria Lane since Susan and Gabrielle tied the knot with Mike and Victor. While Lynette is battling with the effects of chemotherapy, Susan finds out she might have menopause. Bree's faked pregnancy comes close to being uncovered and Gabrielle starts an affair with Carlos. After twelve years of absence, Katherine Mayfair moves back to Wisteria Lane with her new husband Adam and daughter Dylan, who doesn't seem to remember living there.

Smiles of a Summer Night EPISODE 2
After realizing Tom has been letting her win at cards, Lynette kicks him out of her chemotherapy sessions. Katherine suggests a lunch for Lynette to which Bree insists on bringing dessert - her very own lemon meringue pie. Katherine replaces the pie with her own and Bree becomes determined to get the recipe. Julie desperately wants to go to a party but when Mike advises against it Susan forbids Julie from going.

The Game EPISODE 3
Bree informs the housewives of what she overheard in the Mayfair house. Susan is throwing one of her charade parties, and although reluctant at first, the girls all decide to go when they make sure Katherine is going to be there. Stella makes marijuana-laced brownies to help Lynette through chemotherapy. Susan is uncomfortable having Adam as her gynecologist so she asks Bree for the number of hers. At the party, both Carlos and Katherine get upset when they see Gabrielle and Adam flirting.

If There's Anything I Can't Stand EPISODE 4
Wisteria Lane welcomes a gay couple to the street, and unfortunately for them, the first neighbor to greet them is Susan Mayer. Edie is shocked when she receives some news at the gynecologist's office. Gabrielle goes with Lynette to the wig store and ends up giving her useful tips to improve her sex life. The girls throw Bree a surprise baby shower and thanks to Andrew, Bree's ex-mother-in-law Phyllis is among the invitees.

Art Isn't Easy EPISODE 5
Bob and Lee's contemporary water sculpture in their front yard prompts the Wisteria Lane neighborhood association into action. Edie finds out about the affair that Carlos is having with Gaby, and John Rowland, the Solis' former gardener, wants to rekindle his romance with Gaby.

Now I Know, Don't Be Scared EPISODE 6
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.

You Can't Judge A Book By Its Cover EPISODE 7
Lynette's sisters Lydia and Lucy come to visit. While having dinner with Susan and Mike, Bree and Orson realize they share different views on whether their newborn baby should be circumcised. On a boat, Victor confronts Gaby about her affair with Carlos and she throws him into the ocean. Later, Bree informs Susan that she thinks Mike is addicted to drugs.

Distant Past EPISODE 8
A mysterious stalker from Adam's past shows up on Wisteria Lane. Detectives question Gabrielle about Victor's whereabouts. Danielle's baby puts stress on Bree and Orson's marriage. Mike's drug dealer drops by Susan's house. Lynette has a reunion with her long-lost stepfather, Glen.

Something's Coming EPISODE 9
A tornado comes to Wisteria Lane, forcing residents into basements, cellars and safe rooms, and destroying homes and lives. Meanwhile, Susan ends up at the hospital after falling down the stairs.

Welcome to Kanagawa EPISODE 10
In the aftermath of the tornado, the residents of Wisteria Lane try to rebuild their lives. Katherine discovers someone may know her secret while Lynette faces the possibility of her family's fate. Meanwhile Mrs. McCluskey has to face the death of one of her dearest friends, Ida.

Sunday EPISODE 11
Two weeks after the tornado, with Mike still in rehab, Mrs. Delfino gets a visit from her cousin Tim. Meanwhile, Bree desperately awaits to return to her own house. Gabrielle learns that Carlos' blindness is permanent. Katherine is unable to keep some of her secrets from the women of Wisteria Lane. Finally, a surprise wedding ceremony has its own share of secrets.

In Buddy's Eyes EPISODE 12
Bree and Katherine join forces to plan the Founders' Day Ball. Lynette is surprised when Rick shows up at the Scavo pizzeria. Gabrielle struggles with the reality of having a blind husband. Mike asks Orson for forgiveness as part of his recovery program, and Orson starts sleepwalking.

Hello, Little Girl EPISODE 13
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.

Opening Doors EPISODE 14
Susan meets her ex-husband, Karl at a Lamaze class, and finds out that he has remarried and is having another child. Lynette learns who was responsible for starting the fire at Rick's restaurant. Bree wants Orson to turn himself in to the police. Gabrielle rents a room to a hip artist, Ellie, who has a dark secret. Dylan continues meeting with her father, Wayne, and Katherine decides to go spy on her.

Mother Said EPISODE 15
Adele Delfino, Susan's mother-in-law, arrives for a visit. Carlos and Gabrielle find out their tenant, Ellie, has a dark secret. Lynette has more problems with Kayla. A full scale war erupts between Bree and Edie.

The Gun Song EPISODE 16 & 17
Susan and Mike try to name their son. Mike wants to name him after his deceased grandfather, Maynard. Lynette is arrested for child abuse of Kayla. Bree is being stalked by Orson, and when she meets with Reverend Green, the reverend tries to hit on her. Gabrielle is still helping the police trying to detain Ellie for dealing drugs. Katherine is visited by her ex-husband, Wayne, who wants to know why Dylan doesn't have a childhood scar on her arm anymore.

Free
After Katherine announces that she has to leave town, Bree is left responsible for catering Bob and Lee's wedding. Gabrielle finds $118,000 in Ellie's teddy bear. Susan realizes she will soon lose someone she loves. Katherine Mayfair's secrets are finally revealed, and several residents of Wisteria Lane are faced with deadly threats.