: It is revealed that Mary Alice (then Angela Forrest) and Paul bought a baby from a drug-addicted woman named Deirdre Taylor in Utah. They renamed the baby Zach and fled to Fairview to start a new life.
: The blackmail note ("I know what you did") from Martha Huber threatened to expose this secret, leading Mary Alice to take her own life to protect her family. Protagonist Status Reports Desperate Housewives - Season 1Eps23
: Susan is held hostage by Zach Young, who is armed with a gun and waiting for Mike Delfino to return so he can kill him. : It is revealed that Mary Alice (then
: After a season of marital strife, Bree receives a devastating phone call while cleaning silverware, informing her that Rex has died following heart complications. Protagonist Status Reports : Susan is held hostage
Flashbacks provide the final pieces of the puzzle regarding Mary Alice and Paul Young:
: Gabrielle testifies at Carlos's hate crime hearing, lying to protect him, but the truth about her affair is finally exposed when her young lover, John Rowland, whispers the truth to Carlos in open court.