Professor Joanna Bourke charts how, over the past five centuries, dentistry has been transformed from a backstreet horror show into a gleaming modern science. During her journey into dentistry's past, Joanna uncovers how a trip to the dentist's in medieval England could mean much more than a haircut, reveals how a First World War general's toothache would transform British oral surgery, and discovers the strange story of how the teeth of soldiers killed at Waterloo ended up in the mouths of London's rich.