Barbara Windsor in Carry on Spying (1964)

A top secret chemical formula has been stolen by STENCH (the Society for the Total Extinction of Non-Conforming Humans), and so Agent Simpkins and his three trainees are hot on the trail, chasing the villains across the world. There are gadgets galore, and disguises are compulsory if the heroes are to win the day from The Fat Man, Dr Milchman and Dr Crow!