Victoria Coren presents this series about words, inviting the public to make a vital contribution to the Oxford English Dictionary. Arthur Smith tries to get to the bottom of why we go to the 'loo', and uncovers an intriguing royal connection. Victoria tracks down one of Britain's first glamour models to discover when the word 'glamour' lost its innocence. Michael Portillo argues that politicians are increasingly misusing military euphemisms. And the programme heads to Liverpool to discover the earliest use of 'a domestic' to mean an argument.