Iain is unexpectedly reunited with his sister when he is called out to an emergency involving his mother, but his efforts to make amends for his past have unforeseen repercussions. The hospital is inundated with binge drinkers, including a hen party that has ended with the bride getting shot with a bow and arrow. Dylan struggles to cope, but the experience gives him an idea. Grace returns to work, but seems to have lost her ability to talk (thetvdb.com)