Once B613 hired Huck, Charlie took him underneath his wings and trained him, showed him how much fun it was to kill people. But when command found out that Huck had a family he sent Charlie to either take care of the problem or remind that he has to “take care” of the problem. Huck was left in a hole for almost a year. When they finally let him out Charlie helped him get away from the CIA by faking his death.
Charlie was hired by Cyrus Beene to kill Amanda Tanner. After Huck tortures him into revealing where Amanda’s body is, he moves to New Mexico under Huck’s orders, but not before he was suppose to kill Billy Chambers for Huck. Before finally leaving, he visits Cyrus at their home to ask him to wire the rest of his payment for killing Amanda Tanner.
But Charlie ignored Huck’s order to kill Billy, while he was torturing Billy, Billy offered Charlie money and power. Being the opportunist that he his Charlie took Billy up on his offer.
Charlie returns to D.C. after receiving a signal from Huck through the radio for a meeting about B613. Still visibly holding a grudge against Huck, he is much more confident now and not as scared of Huck as he was during their last encounter, he constantly reminds Huck of his torture of him subtly. He later almost shoots Feen after it is revealed that he was the traitor but was stopped by Huck. Later, he is seen contacting someone, saying that he is staying and is most likely going to start doing hits again.
Charlie calls Cyrus to tell him he’s back in town… so Cyrus uses him to follow James because he thought James was cheating on him. A few months later Cyrus calls Charlie to kill James, his own husband – when David subpoena’s James to testify about Defiance. But at the last minute he calls him off, but of course Charlie is still gonna bill him.
Charlie stuck around and started to help the mole by setting up and killing CIA Director Grayden Osborne. Huck gets “boxed” again from being in the crossfire. All the facts are still unanswered. Once the OPA team figure out that Charlie is involved with the mole and helped setup Osborne’s attempted suicide they go looking for him. And surprise surprise they find out that he has a girlfriend, Tammy. Of course he was only using this girl to get information for the mole.
Charlie knew he was in trouble when Jake Ballard figured out that he was onto him. So… who does anyone go to when they’re in trouble in DC… Olivia Pope! He turned himself in – in a manner of speaking – to Huck & Olivia. When the team comes back from a dinner break they find Charlie holding David at gun point and then he surrenders. Quinn and Huck take Charlie to the safe house so they can get the mole’s name out of him.
Quinn stops Huck from killing Charlie and Charlie is let go to be free again.
Courtesy of Scandal Wiki