Back at OPA, the associates are still working hard to find the mole, with the assistance of the newest Gladiator, David Rosen, disgraced former district attorney. David is instrumental in assisting Huck with hacking into Sally Langston's daughter's email account thus giving him access to her home network. The working theory is that the VP is the mole.
Meanwhile, Gladiator Extraordinaire, Harrison realizes that Olivia is the "problem" that needs fixing because the worst kept secret is that she is the President's mistress. He demands to know her endgame so that he can know how to protect her from the fallout. But Olivia has other plans. She seems content in leaving OPA to Harrison in order to ride off into the sunset with Fitz. But of course, this is not to be.
We discover that Fitz, for all his posturing about jeopardizing his presidency's second term by choosing Olivia, did not file the papers for his candidacy. In other words he never intended on running for a second term. When Cyrus tells this to Olivia, she cannot bear the thought of him not running for a second term because he feels that he cannot win on his own. She wants him to run, to exorcise the demons of Defiance and solidify his place in history as the rightful President of the US. This tension is built up by his impending press conference where many believe he will confess to an extra marital affair.
Mellie, on the other hand, has found her own fixer. He is determined to parlay the political firestorm she started into political clout if only she will name the President's mistress. But Mellie is too smart to throw down her "ace of spades" (no pun intended). She is going to hold out and wait until Fitz's press conference because deep down in her heart she knows that Fitz is going to chose the Presidency and by proxy, chose her over Olivia.
Back at OPA, Charlie, who has been rendered persona non Grata, by the mysterious Joe Morton character shows up at OPA looking for a deal. The exact same deal that Huck got which gave him his life and freedom back. He will give up the name of the mole for that deal, but Huck has another idea. Why not just torture the name of the mole out of Charlie and then kill him as the final act of revenge for putting him in the box and separating him from his family.
Charlie gives up the mole, Huck gives him a last meal, a donut, and is about to kill him, when "Baby Huck," Quinn, stops him and reminds him that gladiators don't do revenge. Charlie, who seems to be the cat with a thousand lives, gets away again.
However, Charlie's appearance was just a smokescreen. He entered the lion's den to steal the Cytron card from Olivia's safe. Harrison realizes too late that OPA has been played. And we finally discover who the mole is...
The mole is Billy Chambers and David Rosen is working for him. Yes, the same Billy Chambers we all assumed Charlie killed, is alive and has been pulling strings behind the scene. Billy is now in position of the Cytron card, the President announces that he intends to run for re- election and OPA are compromised yet again by crafty deception.