For 10 points, identify this character, the head of the Secret Service branch which employs James Bond, known only by one letter.
Lesser known actors to play this character include Edward Fox and Robert Brown. In one of his appearances, he is played by John Huston and is accidentally killed in an explosion that leaves only his toupee intact. This character's personal life is largely unknown, but he does collect butterflies and once had an amusing escapade in Tokyo. In a 1977 film, the Soviet General Gogol reveals that this man's first name is Miles. In more recent film appearances, this character is called the "evil queen of numbers." The most recent film saw this character informing the protagonist of the death of Agent Fields. Originally played on film by Bernard Lee, this character was effectively given a sex change when Judi Dench assumed the role in 1995. For 10 points, identify this character, the head of the Secret Service branch which employs James Bond, known only by one letter.
Lesser known actors to play this character include Edward Fox and Robert Brown.
{M} [accept {Miles} before mentioned; {also} accept {Messervy}, {Barbara Mawdsley}, {McTarry}, and {Hargreaves}]