The article offers the author's insights on several secret service agents of domestic security service MI5 of Great Britain where the reason of their visits was to catch on treacheries during teatime. Among the mentioned agents include historian Eric Hobsbawm who was with MI5 since 1942, publisher James MacGibbon who serves Russia and gave information about plans of Germany, and British whistleblower Cathy Massiter who worked from 1970 to 1983 in MI5.