Security lapses seem to point to top civil servants suddenly falling in love and giving secrets to an enemy agent disguised as a char lady. Steed investigates, but first has to save Tara from killing herself out of unrequited love.
Quest roles:
Brian Oulton, Patrick Newell(Sir George Collins), Terence Alexander('Piggy' Warren), Patsy Rowlands(Thelma), Veronica Strong(Martha Roberts), Frank Gatliff(George Fryer), Zulema Dene(Athene), David Baron(Metcalfe), Larry Taylor(Freeman), John Cobner(Guard)