SPOILER The identity of the mole.

In episode 3x07 "The Pickett Line" it is revealed who's the mole. Many people after seeing that Hal had a parasite inside, and have it taken away, thought the story of the mole had come to an end. But that has not happened.

The mole.

The third season begins with a big question: The existence of a mole.

Someone in Charleston is passing information to the enemy.

But who is the mole?