Egg MacGuffin

From a movie review:

[Graham] Moore throws in a Hitchcock-style McMuffin in the shape of a secret tape recording which will reveal just who has been betraying the gangsters. The problem is that no-one has a machine on which to play it.

The writer has egg on his face, or ought to: the Hitchcock device was called the MacGuffin. He explained it to François Truffaut in one of the conversations preserved in Hitchcock/Truffaut (1985):

Well, it’s the device, the gimmick, if you will, or the papers the spies are after. I’ll tell you about it. Most of Kipling’s stories, as you know, were set in India, and they dealt with the fighting between the natives and the British forces on the Afghanistan border. Many of them were spy stories, and they were concerned with the efforts to steal the secret plans out of a fortress. The theft of secret documents was the original MacGuffin. So the “MacGuffin” is the term we use to cover all that sort of thing: to steal plans or documents, or discover a secret, it doesn’t matter what it is. And the logicians are wrong in trying to figure out the truth of a MacGuffin, since it’s beside the point. The only thing that really matters is that in the picture the plans, documents, or secrets must seem to be of vital importance to the characters. To me, the narrator, they’re of no importance whatever.

You may be wondering where the term originated. It might be a Scottish name, taken from a story about two men in a train. One man says, “What’s that package up there in the baggage rack?”

And the other answers, “Oh, that’s a MacGuffin.”

The first one asks, ”What’s a MacGuffin?“

”Well,“ the other man says, ”it’s an apparatus for trapping lions in the Scottish Highlands.”

The first man says, “But there are no lions in the Scottish Highlands,” and the other one answers, “Well then, that’s no MacGuffin!” So you see that a MacGuffin is actually nothing at all.

Hitchcock mentions the formula for the construction of an airplane engine in The 39 Steps (1935), the little tune in The Lady Vanishes (1938), and the secret clause in a treaty in Foreign Correspondent (1940). Each a device to propel a narrative, each egg-free.

Thanks, Seth!

Related reading
All OCA Hitchcock posts (Pinboard)