Catherine's former lover tries to keep Jack away; Sherman's family props up his new business.
Catherine is forced to work with her former lover; Sacker jeopardizes the deal by getting the client arrested.
McConnell ponders his future; Jack and Catherine fret over office romance.
Jack fears Alex is letting her emotions influence a client's new venture; Mitchell's new friend seeks acceptance; Gillian gives McConnell a chance to leave the firm.
Divack tells Jack that year-end bonuses will be smaller than usual; Sherman's sister, Gillian, makes out with McConnell at the Christmas party.
An investor threatens Mitchell's life; Catherine gets stuck in an elevator with a CEO who pitches "Viagra for women"; McConnell meets Sherman's sister.
Jack and Alex are forced to work together; Donna is investigated for insider trading; Catherine and Sacker spar in the boxing ring.
Bridget joins the firm; Donna is in trouble because of her trading practices; Mitchell discovers that Alison is a former porn star.
An infirm trader propositions Sacker on behalf of his sexually frustrated wife; Jack is bothered by the burgeoning relationship between Alex and Mitchell.
Jack must decide if he should keep some inside information to himself at the expense of his co-workers and his company.
Young Wall Street traders work in the fast-paced world of high finance. This episode: Jack's fiancee has a disturbing secret; Catherine joins the firm.