The Avengers S04 E06 The Master Minds

"Mrs Peel, We're Needed!"

A government official, dresssed as one of the Horse-guards, helps in a raid on secret files and is wounded. Recovering, he remembers nothing. Is his crime anything to do with his membership of Ransack, a club for those with high IQs? Emma can join, but Steed may have to cheat....