At last this gem is on DVD.
The Duchy of Grand Fenwick is a miniscule, and out of date country in the midst of Europe. In order to instal indoor plumbing at the castle, Prime Minister, Ron Moody, obtains a gift of £1,000,000 from the Americans telling them that he needs the money for rocket research. His son, played by Bernard Cribbins and David Kossof, an aged scientist, however have other ideas when the Russians, not to be beaten by the Americans, send Grand Fenwick a rocket.
And so the story unfolds.........
There is an all star cast and a naivity about the entire story that keeps it going. Terry-Thomas is excellent as the British Agent, and Margaret Rutherford is superb as the Dotty Duchess.
This one is a firm favourite of mine and is likely to remain so.
Easily the best of the series.
Don't miss it.