Eat, Drink, And Be Buried - S1.E4

Henry and Detective Maggi have been together for three months now. They attend a wealthy businessman and Henry's friend, David Weston's birthday party where Henry is catering food. During an enactment of a scene from the eighteenth century, a fake gun ends up killing one of David's four children. It is up to Henry and Maggi to find the killer as it gets likelier that he or she may be a family member and other family members may be in danger as well