The Event Season 1 Episode 6 (The Event s01e06) with title “Loyalty” aired on Monday, October 25th 2010 at 09:00 pm via NBC Network.
Here is summary for The Event Season 1 Episode 6 :

President Martinez and the Director of National Intelligence, Blake Sterling fulfill their agreement with Thomas, but after their plan goes awry, they suspect that there is a possible mole in their midst.