In September 2008, Harriott took part in the genealogy documentary series "Who Do You Think You Are?". Harriott knew that his great-grandfather Ebenezer Harriott was in the colonial West India Regiment, and had assumed that they were descended from slaves. In Barbados, he confirmed that his great-grandfather had a distinguished military career, and learnt that he had fought on the side of the British in the Hut Tax War of 1898 – an increasingly violent series of protests against systems of taxation in Sierra Leone. Although Harriott had assumed that his great-great-grandfather, James Gordon Harriott, was a black slave, he was revealed to be the descendant of a long line of white slaveowners.