I loved watching this series when it was shown on Channel four. Both leading actors, Simm and Riseborough, were excellent and the supporting cast didn't let them down.John Simm on his own would have made watching this worth while.His character is so full of contradictions that he is fascinating. A blood-thirsty mercenary, fiercely loyal,capable of dealing with unrequited love without taking advantage when it would have been so easy for him, his silent, brooding presence is mesmerising. Capaldi made a very convincing king Charles the first, showing facets of his personality that enabled us both to understand him and sometimes pity him. Dominic West is a first quality actor and his portrayal of Cromwell was interesting in all its ambiguities.Difficult to like and difficult to loathe! I am no historian so I won't give an opinion on accuracy. Visually, this series was striking and I must congratulate the make up artists who managed to age Riseborough in a very convincing manner. This is so rarely the case it deserves to be mentioned.