Which one of the Salinger brothers developed an alcohol problem on "Party of Five"?

"Party of Five" is an American television teen drama created by Christopher Keyser and Amy Lippman that originally aired on Fox for six seasons from September 12, 1994 to May 3, 2000.

The show, set in San Francisco, centered on the five Salinger siblings (the "party of five" referenced in the show's title), who become orphans after their parents are killed in a car accident caused by a drunk driver. The family is composed of 24-year-old Charlie (Matthew Fox), the eldest, a womanizing, immature manual laborer who struggles with the responsibility of being the new head of the family; 16-year-old Bailey (Scott Wolf), the once-rebellious teen turned responsible caretaker—and later-turned-substance abuser; 15-year-old Julia (Neve Campbell), a sensitive teen; 11-year-old Claudia (Lacey Chabert), a precocious child prodigy; and baby Owen, who is barely one year old.

The siblings take over the running of their family's restaurant, Salinger's. Charlie initially serves as bartender and manager, and later Bailey takes over. The struggles the Salingers face over the years include Charlie's battle with cancer in Season 4, Bailey's battle with alcoholism in Season 3, Julia's dealing with domestic violence in a relationship in Season 5, and the long-term effects of parental loss.