"The Doctor is Out"

Martin finds himself held hostage by Annie Winton, who desperately wants him to save her husband, Jim, who has been recently diagnosed with terminal cancer. Annie insists that there must be something that Martin can do to help. Louisa is very worried about Martin's disappearance, and calls on Morwenna, Janice and Ruth for help. But is it too late for Martin and Louisa to save their marriage?