Guest Stars Romesh Ranganathan as Himself James Acaster as Himself Tiff Stevenson as Herself Ralph Ineson as King Henry II Nathan Stewart-Jarrett as Maurice Wilkins Alice Lowe as Rosalind Franklin Steve Oram as Thomas Becket Richard Rycroft as Boss 2 Lisa McAllister as Boss 1 Marek Larwood as Knight Adam Riches as James Watson Joseph Morpurgo as Francis Crick Joseph Varley as Knight