Description: Constance sees Fergus and Daniel strip to their underwear to retrieve a ball they threw into the river. Embarrassed, she runs off and falls on some rusty barbed wire. She contracts tetanus. Back in her time, the vaccine for tetanus is not known, and there are no antibiotics. Meanwhile, back in the present the children discover a family connection between two doctors, one in the past and one in the present. Can the children use this to save their dying friend?