The mole
From Dollhouse Wiki
The Mole refers to an unknown individual who seemingly is working against the interest of the Dollhouse and quite possibly the Rossum Corporation as a whole. While the identity of the mole and the mole's location has never been stated, several hints have risen that the mole is someone within the Dollhouse itself. In an effort to aid in the destruction of the Dollhouse the Mole has contacted Paul Ballard through Echo and November demonstrating that the mole has the ability to use the imprinting technology and at the very least subvert an active's imprint by way of adding hidden parameters.
