The Winter King is a British historical fiction television series based on Bernard Cornwell's The Warlord Chronicles novels written as a mixture of historical fiction and Arthurian legend.
Derfel, known as Derfel Gadarn , was a 6th-century Celtic Christian monk regarded as a saint in medieval Welsh poetry and reported to be one of the warriors of King Arthur, though not listed as a Knight of the Round Table, of which the figure may range from a dozen to as many as potentially (the number of seats at the table) 1,600, the latter claimed by Layamon in his "Brut".
Morgan's appearance differs significantly from the source material, in the original novels she is scarred from being in a fire and wears a golden mask to cover it.
Among author Bernard Cornwell's other historical fiction sagas are The Richard Sharpe Series and The Saxon Chronicles aka The Last Kingdom Series, both also made into television series - Sharpe (1993-1997 & 2006-2008) and The Last Kingdom (2015-2022)