Susan tells him that she wants to help until he says he hopes he and Julie would reconcile. Zach then goes into hiding and reappears in the second season when Mike and Susan are looking for him. In revenge, Zach blows her kitchen up before holding Susan hostage in the first-season finale. Julie initially rebels against this but after Zach scares her at his pool party, she doesn't see him again. Whilst at the institution, Zach was diagnosed with clinical depression and a borderline personality disorder which makes his behaviour unpredictable at best so when Susan asks Zach not to see Julie for a while as she is concerned about how fast the relationship is progressing, Zach loses his temper so Susan promptly forbids him to see her ever again and throws him out. Zach, however, has other ideas and blackmails him to make sure they stay in Wisteria Lane as the police are asking questions about an old toy box that Zach once had as a similar one has been found with the body of a young woman inside. Susan speaks to Paul about Julie and Zach's relationship and is irritated when she thinks he is laughing at her but he insists it will not be a problem as he and Zach will soon be moving away. Zach later runs away and is found hiding in Julie's room by Susan and Mike who take him home. During his stay, Julie sneaks in his room to speak with him but is asked to leave by a nurse.
In season one, Zach is depressed by the sudden suicide of Mary Alice, so Paul puts him in a mental institution. Zach's birth parents are Deirdre Taylor and Mike Delfino however, this, along with his original name of Dana Taylor, is not revealed until " One Wonderful Day". Zachary "Zach" Young ( Cody Kasch) is the son (non-legal) of Paul and Mary Alice. Main article: John Rowland (Desperate Housewives) Zach Young They are sorted in the order in which they were introduced to the main cast, and not by episode count, screen time, or popularity. The following are characters whose portrayer received "Starring" billing at any point of the series.