"They all deserve it."
As a child, Cat was abused by her father Daniel, who later went away for manslaughter related to the death of her mother and his wife Laila. She was sent to a foster home, but she was abused by the foster father, who she eventually killed. At some point, Daniel was released and left the U.S. shortly afterward. As a result, Cat traveled around the world in search of him, hoping to kill him as punishment for his actions. When she couldn't, however, she channeled her rage towards other men. Cat eventually became a member of an online network of hitmen that cropped up after the dismantlement of the Silk Road by the FBI in 2013, and became known as "Miss .45". Having developed psychopathic tendencies, Cat was the only member of the network who preferred to kill her targets up-close and personal, in contrast to the long-distance kills carried out by her colleagues. Though she was faithful to a vast majority of her contract kills, she actually double-crossed three of her clients when they wanted her to kill their wives, as said clients reminded her of Daniel, who she was still searching for.
Cat is first seen meeting an undercover Reid at the Harry & Glenn's Grill and Bar. As they sit down, Cat asks about Reid's wife and asks how long he has been married, and he replies that it has been four years. Then, Cat asks Reid to show her his ring, which he does. Rossi and JJ are in the restaurant as well, watching the both of them. Cat looks at the ring, and tells Reid that a four-year-old ring would have scratches while his is clearly new. She then says that she knows Reid isn't married and that she knows that Garcia is overhearing her through the microphone hidden on Reid's tie, going on to greet Garcia. Next, Cat pulls out a gun, points it at Reid under the table, and says to him that she didn't walk into the BAU's trap; they walked into hers. She discreetly takes Reid's gun as the waiter comes by. She innocently tells the waiter that she and Reid are having so much fun to know one another and that they will let him know when they're ready. Once the waiter leaves, Cat tells Reid that she knows JJ is in the restaurant and orders him to have her walk out. As soon as JJ leaves, Cat expresses her knowledge that the BAU's plan is to have her walk out the door where the police are waiting. Reid confirms this.
Reid profiles Cat, and she asks him if he likes games; he replies by saying that he does. Cat sets a timer on Reid's phone, and tells him that he has thirty minutes to answer every question she asks him and that if he lies, she will know. Then, Cat sets up the rules of the victor: if Reid wins, then he will drag her out in handcuffs; but if she wins, then Reid will escort her out like a gentleman, making sure she exits safely. Reid tells Cat that she is going to have to shoot him in the face before she walks out. She replies "Game on", then she starts the timer. First, Cat asks him about the time he was out of work and Reid tells her how the BAU used the flash-drive retrieved from NSA Director Brian Cochran to show the other members of the network. Zac Rubenis and Barry Plyman were taken care of and Barry Winslow, the group's captive technical analyst, was rescued. Cat asks Reid about why he took time off from work, but he tells her that she can ask him the same question as many times as she wants, but he will not answer, adding that she is not the first woman to point a gun at him. When Rossi gets up from his seat and approaches their booth, Cat sits towards Reid, turns off the microphone on his tie, and tells him that she will kill Rossi. Reid finally tells Cat why he took time off from work: his mother's new medication for her schizophrenia seemed to agitate her, so he went to the treatment center to help her.
However, Cat doesn't believe his story and thinks Reid is holding something back. She adds another ten minutes and tells Reid that she flushed out the other agents in the restaurant, but unbeknownst to her, Lewis and Morgan are in the restaurant as well. The timer runs out and Cat tells Reid that he forgot to ask her why she would make him sit in the booth for thirty minutes. Reid replies that she is stalling, but Cat says that he doesn't know her at all. She then reveals that she came to the restaurant with a partner who planted bombs in the building that are connected through the city's gas lines, which can blow up the whole block. Cat taunts Reid about her victory, which is to remove all backup away from the building because if she walks out and sees one cop, she will incinerate all of them. She then threatens into the microphone that the FBI will be responsible for the disaster. As a result, Lewis tells the employees about the situation, tells them to not rush and overreact, and orders them to give every customer their check and tell them that they will have to leave due to a situation in the kitchen. Meanwhile, Cat walks up and is about to leave, but Reid tells her that he found her father.
According to him, Reid found a homeless Daniel in Washington, D.C. The alcoholism in his brain had been shredded, rendering him unable to remember Cat. Reid apologizes, but Cat doesn't accept it. She asks Reid more about his mother, and he reveals that he found out she has dementia, most likely Alzheimer's. Cat thinks that Reid came to show up to help her, but she tells him how many men told Cat that they wanted to help her, but in the end, she wound up killing them. Meanwhile, her partner arms the bombs and prepares to detonate them, but Morgan and Lewis stop her before she can do so, which causes Cat to hold Reid at gunpoint. Morgan manages to talk Cat down from shooting Reid by telling her that they have her father outside in an armored van. She drops the gun and has Reid escort her out. However, when they step outside and approach the van, Cat realizes that they lied to her. As Reid cuffs her and puts her in the truck, Cat becomes devastated. Reid confesses that he did look for Daniel, but he couldn't find him and he made up the story about him being found as a homeless drunk. However, Cat taunts that she still won because she will be out in twenty years, but Reid replies that will only happen if she is lucky. Cat then adds that in twenty years, she will remember Reid's name, but he will not remember hers, referencing the fact that dementia could be a genetic disorder.
Cat targeted various people through her capacity as a hitwoman, though her favorite target was married fathers who actually hired her to kill their own wives, because they reminded her of her father. Once she had her victims in a highly compromised position, she would kill them by shooting them with a .45-caliber handgun, hence her nickname. She briefly mentioned that she would be so good at manipulating that she could get her targets to kill themselves, though it is unknown if that is indeed the case. During the standoff at Harry & Glenn's Grill and Bar, she held Reid at gunpoint with a .40-caliber Springfield Armory XD handgun and coordinated her actions with Sharon Mayford.
According to Reid, Cat is a "black widow"-type hitwoman who specializes in seduction and is extremely patient. She learns everything physical, psychological, and emotional about the men she is hired to kill because she wants them to be in as compromised a position as possible so they do not see it coming when she pulls the trigger. She sometimes double-crossed her own clients and killed them because they wanted their wives, making those kills personal. In all of her contract kills, she is up-close and personal, much unlike her colleagues, and she knows that she has to be more careful because she actually wants to kill her targets.
- Unspecified dates and locations:
- Her unnamed foster father (killed by unknown causes; his death was ruled as an accident until 2016)
- Daniel Sparman (a client)
- Jared Gratton (a client)
- Warren Korting (a client)
- Unspecified dates and locations from 2005(?) to 2015: Numerous unnamed victims, estimated to be around or over 200
- January 13, 2016, Washington, D.C., U.S.: The Harry & Glenn's Grill and Bar standoff:
- Aubrey Plaza, the actress who portrays Cat, previously costarred in Life After Beth with Matthew Gray Gubler, the actor who portrays Reid. Because of their connections, she landed the role of Cat after Gubler sent her the episode script and asked her to guest-star in Entropy.
- With a final body of approximately over 200 people, Cat is one of only seven unsubs in the show's history who are confirmed to have claimed the lives of hundreds. The first six are Vincent Perotta (who killed hundreds of people, with an exact number unspecified), Frank Breitkopf (who killed at least 176 people), Billy Flynn, a.k.a. "The Prince of Darkness" (who killed approximately over 200 people), Thomas Yates, a.k.a. "The Womb Raider" (who killed at least 103 people), Hayman Vasher (who killed 151 people), and Sharon Mayford, a.k.a. "The Bomber" (a fellow hitwoman who killed at least 173 people).
- Cat is extremely similar to Izzy Rogers, a criminal who appeared at the end of Season Seven. Both were prolific, female serial killers and international criminals who targeted victims all around the world, had manipulative and psychopathic tendencies, and were members of ragtag criminal groups. Both also engineered a standoff against the BAU and other authorities in Washington, D.C., with accomplices; both standoffs involved dozens of hostages, including a member of the team, and the use of explosives, though Izzy was successful in detonating hers.
- Season Eleven
- ↑ Cat was described as the member of the network with the highest body count, and Mayford was responsible for 173 deaths in one event