The third season of The Crown expands upon the role of Prince Charles in the monarchy, as the future heir prepares for a life in the shadow of the throne. Episode 6 in particular documents Charles' time studying Welsh ahead of his investiture as Prince of Wales, and explores the fascinating dynamic between Charles and his tutor, Edward 'Tedi' Millward, a professor of Welsh language at Aberystwyth University and a staunch Welsh nationalist who opposed everything Prince Charles and the British monarchy stood for.