Matron's growing suspicions she mixed up Joan's baby with another leads to a confession with Father Ross. Matron struggles with her conscience as she weighs the hospital's reputation against Joan's right to know. As Viv starts to feel the stirrings of wanderlust, Martha is driven by guilt; Bowditch's mind is firmly on starting a family, and she's determined to keep the fact she's on the pill a secret. Debbie manages to secretly rendezvous with her lover Alan, and discovers their plans to move to Paris have hit a snag. In the excitement of the International Women's Day march, Joan senses baby Laura is unwell. After a diagnosis of pneumonia, Andrew does all he can to help cure the child, but as Laura's condition worsens, Joan is forced to accept the harshest truth of all - her baby might die.