Ludicrous and pathetic
It's ludicrous that Heston be asked to play an intellectual; one might just as well as ask a gorilla to play Shakespeare.
And it's pathetic that the impoverished Redgrave be asked as an accessory to it.
Well we know you are the gorilla.
Heston was well educated, and he was certainly intellectual. All his early theater work was Shakespeare and Ibsen which garnered him the critical acclaim that got him to Hollywood.
He was one of the few in Hollywood brave enough to be a vocal supporter of the US civil rights movement, in fact he led Hollywood in that respect being the chair of the artists movement in support of LBJ's Civil rights bill. And a selected by his fellow actors to head their major union, the screen actors guild.
He was certainly more intellectual and involved in civic affairs than Scofield who never did anything except act.