Desperate Housewives (2004)

S4E1 Now You Know

Susan discovers she is pregnant, while Bree persists in pretending to be expecting. Gabrielle rekindles a romance with her ex-husband, Carlos, and Lynette struggles to hide her cancer diagnosis from her family and friends. Additionally, the episode marks the return of Katherine Mayfair, an old friend of Susan's, who comes back to the neighborhood after a 12-year absence.