Mad Tessa, a nightmare from the past, returns to haunt Karen, and only Fenner can save her. New inmate Barbara Hunt goes through hell in a case of mistaken identity. Zandra complains of headaches and collapses, only Crystal believes it is not drug related. Yvonne keeps up her end of the bargain, but does Fenner?

Yvonne's daughter arrives with tragic news about her father, but she is not pretending. Fenner thwarts Yvonne's escape attempt in the nick of time. Helen's new role gives her the opportunity to re-open Nikki's case. Zandra's illness is finally - and tragically - diagnosed.