Slim Pickens as a Le Chiffre henchman. But
who's going to play M? Wait- as I said in my
first post in this thread- what about Honor
Blackman?
But we are drifting now from what the OP had in mind- making CR as a serious film...
Sorry. The original release of Casino Royale was in 1954, on American TV, with Barry Nelson as Jimmy Bond, and Peter Lorre as Le Chiffre. Serious enough I was rooting for Peter Lorre.
Honor Blackman is Pussy. Slim Pickens can play Q, if he supplies Bond with a Cracker Jack compass. His scene in 1942 always breaks me up.