Mission leader Dan Briggs (played by Steven Hill), only appears in the opening and planning scenes of the episode. He is absent for the rest of the show.
The coastal location shown in the shot that opens the story is actually Monaco. The same footage was used to represent a different fictional nation in The Brothers (1969)
Lawrence Montaigne (Kostas's Aide) was almost cast as Mr Spock when it became possible that Leonard Nimoy wouldn't be available to play the role in order to appear on Mission Impossible.
Lawrence Montaigne played the Vulcan character Stonn in the original Star Trek series show "Amok Time".
This is the first of the multitude of instances during the series when the IMF team snatches the capital, usually ill-gotten, of the adversary.....often in the millions. Throughout the series it was never fully explained or shown what happened to the loot. Although in one future mission, gold bullion meant for a resistance movement was to be returned.