Dan arrives at a book collector’s office and exchanges sign and countersign. Dan picks up his tape and is briefed on Henrik Durvard, who has seized power in Lombwanda. He has taken a $30 million diamond from the tribesmen who found it and plans to take over independent tribal areas in his country. The IMF must recover the diamond...Read the full recap
In the hotel room, which is supposed to be in London, there are numerous closeups of the electric outlet while Barney is switching the diamond, so it's clearly visible that it is an American outlet, since British ones look very different.
During other scenes in which the IMF team members are supposed to be in the UK, it's obvious that they are not: during the fake robbery, the car is not driving on the left as it should, and the street markings as well as the Walk/Don't Walk sign of the traffic lights are clearly American.
This episode, an example of Woodfield's interest in confidence games, is basically the story of Count Victor Lustig's money machine, more generally known as the "money box" or "salting the mine." Like many confidence games, it exploits the mark's greed.