Sir Rodney Ffing (Sid James), an Englishman of the finest breeding, decides to lift a little finger (or even two). Daring rescues are staged and a calling card is always left bearing the contemptuous sign of that damned elusive The Black Fingernail.

France is in the middle of a revolution and the aristocracy are busy making the acquaintance of Madame Guillotine. To the rescue comes the dashing Black Fingernail; snatching the aristos from the jaws of death. Citizen Camembert is sent to England to track down the Black Fingernail and bring him to justice...

 Like Cowboy, this is an extremely ambitious film. A historical story, it is visually a masterpiece; wonderful sets, scenery and awash with derring do. There are plenty of gags interspersed throughout, but as a whole, I'm never left with the impression that it's much of a comedy; simply an adventure. Not necessarily a bad thing, admittedly, but it's not enough to elevate it to the heights of some of the series' classics.