Grace Barrows

Grace Barrows " (née Keating) Is the Senior Advisor to the President Of the United States in the administrations of Pauline Mackenzie and Darius Tanz.

Season 1
In the beginning, Grace Barrows was in a covert relationship with Secretary of Defense Harris Edwards and preparing to transfer out of the Pentagon so that they can be in the relationship openly.

Grace's plans change when Darius Tanz shows up at Harris's office to show him Liam Cole's findings about the asteroid due to hit Earth in about six months, threatening extinction. Department of Defense had named the asteroid Samson and planned to destroy it into smaller fragments that will potentially hit Russia and China catastrophically. Not wanting to let Harris follow through this plan, Grace decides to stay at the Pentagon.

In the meantime, Darius also finds himself distrustful of the government's ideas, and instead has his own plans to save humanity: by selecting 160 of the "best" people in the world and shipping them to Mars to restart human civilization. But to make this happen, Darius needs a government insider to steal some nuclear fuels for the spaceship Salvation, and enlists Grace's help to do so. Not happy with Darius's Project 160 either, Grace convinces Darius to save everyone, not just 160 people.

Grace uses her close relationship to Harris in order to get access to the proper authorization codes to the uranium Darius needs. Darius, in turn, helps them fake a call from Harris giving the authorization code to allow the transfer of uranium out of the government's facility. Unfortunately, Grace's initial attempt to get the proper code results in the loss of one of her earrings, which she later has to distract Harris to retrieve. She then goes to the facility, claiming she's been sent by the government to get the materials and using the authorization code. The plan almost results in Grace's arrest, but she narrowly escapes.

Grace continues to work closely in attempting to aid Darius' plans, eventually lying to the people closest to her in order to accompany him to Russia so that Darius can make an attempt to coax his uncle to help them. They attempt to connect with one of Grace's contacts, but later learn that she has been murdered and they have been set up to take the fall for her death. Grace is arrested for violation of the Logan Act upon returning to the US, but is later released.

An assassin is sent to attack Grace, but is killed by her in self-defense. Shaken, Grace enlists her father to help cover up the assassin's death and find out who hired him. Later, she joins Darius to watch as the electromagnetic drive he has been working on is successfully launched into space for the first time.

Hugh Keating
Hugh is Grace's father, who has a history in intelligence work. In the first season, he helps his daughter after an assassin breaks into her home and is murdered by Grace in self-defense as she fights for her life. Hugh is frank and honest with Zoe, and only wants to see her happy.

Zoe Barrows
Zoe Barrows is Grace's daughter. Grace and Zoe are shown to have a fairly close relationship, although the young woman does keep some secrets even from her mother, specifically her ties to the hacker group RE:SYST.

Harris Edwards
Grace and Harris were co-workers who were romantically and sexually involved during the series' first season. Harris trusted Grace so implicitly that he used his pull to get her a higher security clearance, so that he would not have to lie to her regarding matters of National Security. Grace considered the relationship to be serious enough that she wanted her daughter, Zoe, to meet Harris, but Zoe ended up meeting Harris alone after her mother left the country.

After she uses his authorizations to steal nuclear fuels for Darius, her relationship with Harris cools, as he does not feel he can trust her. Unfortunately, Grace begins lying to Harris in order to help Darius work on his projects. By the middle of Season 2, Grace maintains a close friendship with Harris, but their romance is over.

Darius Tanz
Harris introduces Grace to Darius on the same day they meet Liam Cole. When Grace realizes the Pentagon's plan to save the world failed, she offers to do whatever she can to help Darius in his mission to save the world. Grace changes significantly throughout the story as she becomes closer to Darius. By the series' sixth episode, Grace goes undercover with him to Russia, and their relationship grows deeper during the trip.

When "Salvation" is ready to launch, Grace learns that Darius has decided not to include himself in the 160 people chosen to board the rocket bound for Mars, forcing her to confess her romantic feelings for him in the hope that he will save himself.