That scene between Stokes and Julia, late in the Adam storyline, where they're in the drawing room at Collinwood with a chessboard between them, really sums up well the ambiguities of what the writers reveal regarding what Stokes does and does not know.
It's a really well written scene, played with deft finesse by a pair of true masters of their craft--Grayson Hall and Thayer David.
G.