Those of you who’ve seen the British House of Cards (the 1990 TV series on which the US House of Cards is based) may chuckle at its very flattering portrayal of Charles as a near-saintly prince, earnestly devoted to the public good, but ruthlessly done in by the nefarious prime minister. That the fabulously wealthy Windsors are among our very highest overlords is a fact unknown to most of us, since the true history of Britain’s global doings has (with just a few exceptions) either been blacked out or wildly prettified; and so this powerful new half-hour documentary is one...