"Well, when the president does it that means that it is not illegal."
One of the most infamous political quotes in history, it encapsulated the corruption at the heart of the Watergate scandal in a single sentence. But how was Richard Nixon finally coaxed into making this damning comment, that would define his Presidency and set the benchmark against which all future abuses of executive power would be compared?
The answer is provided by Frost/Nixon, a new play by Peter Morgan which dramatises the behind-the-scenes events before and during the taping of "one of the most monumental political interviews of all time".
Having won rave reviews in London's West End, the play will now transfer to Broadway at the end of March complete with its stars Frank Langella and Michael Sheen.
Both leads are excellent and the staging is superb - a bank of TV monitors gives the audience close-up views at crucial points so that Langella in particular has to simultaneously act for stage and television - but the best reason I have for recommending it is that it demonstrates a truth more pertinent today than ever, in light of recent events.
Namely how hard it can be to extract an admission of guilt from the so obviously guilty!
And if you see how close David Frost came to failing in that task before their last interview session you'll know what I mean.
(and no, I don't own shares in the production!)