Cuddy?s mother, Arlene (guest star Candice Bergen), is admitted to Princeton Plainsboro after complaining about unusual symptoms, but stubborn Arlene insists that House be removed from the case, forcing House to come up with non-conventional -- and illegal -- means to treat his patient. House instructs his team to follow his lead, and they discover details in Arlene?s personal life that she kept secret from Cuddy and her sister Lucinda (guest star Paula Marshall). Meanwhile, Taub?s ex-wife, Rachel, puts him in contact with her brother who hires Taub to work a job on the side in exchange for much-needed income, which winds up taking a physical and emotional toll on him. Later, Cuddy places her trust in House to ensure that her mother receives the proper medical treatment, leading by the book medical student Masters to reevaluate her responsibility to practice within a code of ethics and to follow her boss? orders.