Vice President Natalie Maccabee
The current vice president, who made history as the first female vice president in American political history. She's covertly in charge of Section 5, a black ops unit under her office to conduct operations from underneath the public eye.
- Action Politician: During the hostage crisis in Paris, she secures a cockscrew in the theater lounge and uses it to stab a terrorist in the chest.
- No Celebrities Were Harmed: She's based on the possibility that someday a woman could be in the White House as a vice president given the upcoming American presidential elections.
- No Party Given: The show doesn't indicate if she's a Democrat or a Republican. Given that she was created based on Hillary Clinton, it's possible that she's a Democrat.
- Wrong Genre Savvy: Vice-President Maccabee believes her husband, not long before his death, was cheating on her again. In fact, he was meeting with a woman who may be part of the "Shadow Government" cabal.
Agent John Case aka "Agent X"
An ex-Green beret and black ops operator who had been held captive in Iran, he was recruited into the program after he was rescued by Raymond and Malcolm from a VEVAK prison.
- Broken Pedestal: Once he finds out that Raymond Marks is actually Nicholas Volker.
- Elites Are More Glamorous: Used to be with the Green Berets prior to his recruitment to the program.
- Generation Xerox: With some irony in it. His supposedly deceased father used to be one back in the Cold War, but has decided to stay hidden in order to protect his family.
- Omniglot: Can speak English, Farsi, French, Russian and Spanish. Justified since as a special forces/black ops operator, one must be able to communicate in a variety of languages.
- Weapon of Choice: Used a Smith & Wesson Sigma when he first joined the program before he moved to a Walther P99. He later settles with the HK P30.
Chief Steward Malcolm Millar
The steward in charge of the Number One Observatory Circle, he's also the acting head of Section 5 whenever the Vice President is not around.
- Good Is Not Nice: He has interfered in John Case's life directly and indirectly, in the name of keeping his "Agent X" focusing on his Section 5 duties.
- Retired Badass: Used to be an Agent X operator in his younger days.
- Weapon of Choice: Uses a SIG-Sauer P229R, sometimes outfitted with a suppressor. He also uses a M14 EBR.
President Thomas Eckhart
The current president of the United States and the previous vice president before Maccabbee was elected.
- Good Is Not Nice: Eckhart tolerated the death of the Russian president near the end of the 1st season. Season 2 plans would have him go forward to a faction of Agent Xs to ensure control over the US.
- He Knows Too Much: The conspiracy and Nikolas Volker suborned a Secret Service Agent to attempt to kill him in "Long Walk Home", in part because he and his Vice-President are aware of moves to subvert the Constitution.
- Reasonable Authority Figure: Allows Maccabbee to act on her findings with S5 once she was able to bring in convincing proof of conspirators in the government against him.
- No Party Given: The show doesn't indicate if he's a Democrat or a Republican. Given that Maccabbee was created based on Hillary Clinton, it's possible that he's a Democrat.
Chief Justice Caleb Thorne
The current Chief Justice, he's responsible for ensuring the legality of S5's actions under the US constitution.
The current director of the FBI.
- Properly Paranoid: He's savvy enough to realize that some agency is acting outside the FBI's, or CIA's, purview, and is concerned that this could mean an undermining of the FBI's jurisdiction, as an organization or agency acting without effective oversight could endanger the government. He's not wrong, but he's not looking where he should.
Nicholas Volker aka Raymond Marks
A world-class criminal on various law enforcement wanted lists. No one knows how he looks like. He was formerly an Agent X operator by the name of Raymond Marks.
- Big Bad: The one responsible for orchestrating most of the show's events. He turns out to be John's predecessor as Agent X, Raymond Marks.
- Even Evil Has Standards: During the hostage crisis in Paris, Volker taunts the Russian Prime Minister by reminding him of his hatred of Russian intervention in Eastern Ukraine.
- FaceHeel Turn: According to Eckhart, he "went rogue" and survived an assassination attempt to become a major figure in the realm of international organized crime.
- Meaningful Name: Volker is Teutonic, which means "People's Defender". He himself explains the significance of his surname to Case.
- Rogue Agent: Went rogue after he was "forced" to place a suspect under WITSEC custody. He didn't take it too well.
- The Ghost: Law enforcement and intelligence agencies were not able to properly ID him. That is, until he revealed himself to Case in Mexico.
- Well-Intentioned Extremist: Volker doesn't consider himself a criminal or terrorist but rather a folk hero. Thus his alias "Volker" meaning "Of the people". As a former Agent X, he describes himself as now acting as "Agent X for the world."
- He also wants to help Case avoid making the same mistakes he made.
Once a rising ballerina in the USSR, she went underground and became one of Volker's mistresses before going into hiding.
- Big Damn Heroes: Olga shows up in Paris just in time to help Case fight off Volker's men.
- Dark Action Girl: Shows her skills when she fights Case in "Pilot".
- HeelFace Turn: She joins John Case's side after Volker decides she has become a liability.
- Omniglot: Olga can speak English, French and Russia.