Micah Leggat is a Security guard at the Jeffersonian Institute in Washington D.C.. He has known Brennan for nine years, and when she asked why she could only seem to understand him, he replied "I've learnt the secret language of the Jeffersonian". He has a fondness for the lectures provided by the Institute and they are partially why he works there. There is conjecture on whether Micah is a real person, or just a figment of Brennan's overstressed, emotional and sleep deprived mind. This theory is supported by the fact that only Brennan saw and talked with him, and he only appeared once in the series.