Last and least of Cliff Richard's trio of travelogues, it's actually of far greater interest as writer Michael Pertwee's second satire on the arms race of the sixties (the first being 'The Mouse on the Moon').
The same subject of a lost nuclear bomb was dealt with again the next year in the far more pretentious but much sillier 'The Day the Fish Came Out'.
The same subject of a lost nuclear bomb was dealt with again the next year in the far more pretentious but much sillier 'The Day the Fish Came Out'.