Along the way, they encounter STENCH agents the Fat Man and Milchmann (who stole the formula whilst disguised – befitting the English translation of his German name – as a milkman).

Daphne and Harold attempt to steal the formula back whilst disguised as dancing girls in Hakim's Fun House, where the Fat Man is relaxing.

One or two of Crow's female assistants wear hairstyles similar to those of Modesty Blaise, whose adventures had started in the London Evening Standard the previous year.

[8] The Monthly Film Bulletin wrote: "Straight off the Carry On assembly line, this spoof on James Bondery looses a few random and very limp satirical shafts, but is for the most part content to stick to routine: in other words, a few bright gags are buried in a waste of coy camp, female impersonation and mildly smutty jokes.

Bernard Cribbins manages to be quite funny, especially when disguised as an Oriental harridan in an Algiers bordello ... twanging desultorily at a stringed instrument and emitting a piercing parody of Eastern song in quarter-tone style; as a newcomer to the team, Barbara Windsor is decidedly an asset; and Dilys Laye is charming as Lila.”[9] The Radio Times Guide to Films gave the film 3/5 stars, writing: "Spy spoof mercilessly ribbing the Bond movies and Graham Greene's espionage entertainments, the ninth Carry On saw Barbara Windsor make her series debut as the most resourceful of a hamstrung quartet of agents sent to Vienna to recover a secret formula.

The Casbah scenes rather slow things down, but the action picks up pace in STENCH's underground HQ (a wonderfully observed 007 send-up).

Bernard Cribbins, Charles Hawtrey and Kenneth Williams are on form as Babs's weak-kneed accomplices and there are splendid turns from Jim Dale and Eric Barker."