At a Rotary Club dinner for several prominent people of the town, representing professions and crafts, the middle-class Mainwaring tries to ingratiate himself further with the upper classes, with little success.
As he talks to Jones (who is representing the butchers), he is annoyed when he discovers that Walker is in attendance as well, mostly because he was the one who supplied all the food and drink for the event.
Mainwaring calls the idea a "farce", claiming that the commandos use "brute force" rather than cunning and intellect, a notion that the others agree with.
The platoon is challenged to plant a dummy bomb in the Officer-in-Charge's office located inside a secure compound, which is protected by a guarded bridge.
Harold Snoad and Michael Knowles adapted the television script of Brain versus Brawn as a radio episode.