You're kinda small. You'd dissolve quick. - Owen to Birkhoff
Owen Elliot (born Sam Matthews) is a former Division cleaner who was one of the specially chosen few assigned to guard one of Percy's black boxes which contains data and information on the secrets of Division which if obtained can be used to take down the organization. He was also the one that killed Daniel Monroe, Nikita's fiancé. In the end of the series, he becomes the head of security to protect Alexandra Udinov.
The Army Years
In 1999 Sam along with his Delta unit were assigned to be in Kosovo.
In "The Guardian" Owen took a black box from the bank. Nikita found out that he, much like her, became attached to and eventually fell in love with a civilian, Emily, which is something not permitted as a Division operative. Emily was later killed when Division agents came after him, at which time he was convinced by Nikita to go rogue and try to take down Division by finding the other black boxes.
In "Resistance" Nikita nursed him to health. He revealed to her that he killed her fiance Daniel Monroe and that she should kill him for that. Nikita spared his life and told him that they will retrieve Owen's box (he buried it somewhere) together. Nikita went to help Alex. Meanwhile Owen escaped, dug up the box and took it with him.
In "Dark Matter" Owen released some of the content from the black box. But in the end he decided to give the box to Nikita who destroyed it.
Owen returned in "Falling Ash". It was revealed that he works for Gogol.
Season ThreeOwen returned in Season Three where it was revealed he had been confined to a Russian prison. He was broken out of prison by Anne, a rogue Division agent, per request by Amanda. Amanda needed Owen as he was the only one alive who knew the whereabouts of the Cryptograph . Upon his return, he divulged to Nikita that he couldn't remember his life before Division. After a confrontation with Amanda at her safehouse in Luxemburg, he discovered his real name is Sam. Though Amanda escaped, his past remains a mystery, that is until Owen went to clean up a murder scene after Amanda killed Evan Danforth. She knocked him out and reversed the brainwashing she did to Owen years ago. After Nikita woke him up sometime after Amanda left, Owen revealed he was actually named Sam Matthews.
It was later revealed that Sam was working with Amanda, and she had him trick Nikita into helping him kill the last surviving member of his corrupted unit that was selling drugs. The reason Owen killed him was the same reason he killed the other members of his unit: they attempted to cut him out of the deal he masterminded. Shortly after, he turned Nikita over to Amanda who gave him cash and connections to people he could sell the contents of the last black box to.
Sam later took the black box from Ryan Fletcher's safe; however, Michael caught onto Owen after he asked suspicious questions about it. Michael confronted and fought Sam until an armed team that was loyal to Alexandra Udinov's mutinous group found them. This was both good for him because they detained Michael, and bad for him because they put Division under lockdown with no way to get out.
Shortly after, he called Amanda to inform her that he couldn't leave due to a coup d'etat in Division forcing a lockdown; however, he actually helped Amanda in her further plans to mentally destroy Nikita for after Nikita listened in on that phone call while in Amanda's captivity, had a horrified look on her face, knowing Amanda got a huge victory.
In episode High-Value Target, Sam conducted an auction of the black box during G-20 with the German Intelligence agent as the bid winner. The agent who is himself a double/sleeper agent working together with Amanda, double-crossed Sam. During the ensuing fight near the end of the episode, Sam shot and killed the double-agent and had an opportunity to recover the black box, but instead he shot and destroyed it. The pursuing Nikita and Michael saw Sam left the scene and found black box destroyed. Nikita wondered aloud saying, "Sam?" To which Michael responded, "Or Owen. Maybe we haven't lost him yet."
One hundred days after Nikita was framed for assassinating the president by The Invisible Hand and Amanda, Sam turned up. He wanted a scanner that Alex found thinking it will lead him to Amanda so he could get his revenge for humiliating him at the G20 Summit. But Alex wasn't going to give it up so easily. Just as they were going to fight for it, they were pinned down by The Shop's agents. They eventually got away and head over to Alex's hotel room which she was sharing with Sonya. Sonya like Alex didn't trust Sam so they wanted him to leave. Sam refused, despite having a gun pointed at his head. Alex made a compromise that he can stay and she would share their findings. But Alex was caught by the CIA and was later interrogated. Sam escaped with Sonya and they called over Michael so he could help spring Alex loose from the CIA. Sam would later on tell Nikita to land in an airstrip in Pakistan after the Shop's plans to start World War III between the USA and Pakistan. But the drug dealing terrorists there wanted a "parking fee" for Nikita and her group to stay there. So Alex and Sam took out the one piece of finance that the CIA didn't keep behind a frozen account, diamonds. Alex used 12 million worth in diamonds to the terrorists so she could pay for Nikita's "parking fee." Sam would later on attempt the steal the diamonds, but he saw a Shop agent sneak into the hotel and Sam's conscience convinced him to stop the agent. The agent told them everything after Sam tortured him (including telling Alex that he was trying to steal the diamonds when she was alone after Sam left).
Alex would give Sam a suitcase full of broken glass and a tracker rather than the real diamonds. Sam did go to the rendezvous point, but was stopped by a loan shark who he owed money to. Alex would later on save him and told him the diamonds where fakes. Shortly after Alex and Sam had a sexual tryst and began their relationship. But it wasn't long until they found out that Ryan Fletcher killed himself in order to tell Nikita and her people that Amanda was alive. After Sam consoled a grieving Alex, Sam was sent to the military base and was given instructions and told the rest of Nikita's people Nikita and Alex's plan to take down the shop and Amanda once and for all. He was in on the scam that Nikita cooked up to bring down the Shop and it worked. Like the others, Sam was pardoned for his crimes and with the rest of the team paid his respects to Ryan.
Sometime later, it was revealed that Sam and Alex would continue their relationship and he would be at her side as her bodyguard and head of her security.
Having no memory of who he was Owen embraced his life as a Division operative displaying loyalty to Percy by killing loved ones of Division agents. Owen later even became a guardian. He later fell in love with Emily and wanted to keep her out of his dangerous life and be with her. After her death he joined Nikita in her cause to take down Division.
Owen was shown to be highly loyal to Nikita and followed her during her missions.
After Amanda restored his memory he remembered who he was again. He started to call himself Sam again and displayed selfish behavior as he quickly turned on Nikita and his friends to make money. His ruthlessness even surprised Amanda as he was willing to kill anyone in his way and lied and deceived to get the black box. He mentioned he considered his years as Owen wasted and wanted to make it up for it by getting a huge amount of money. He also was keen on killing Amanda even though he was willing to make her live as long as she was useful to him.
During certain moments he acted like Owen again. He stopped Amanda from manipulating Nikita and even destroyed the black box to help Division.
A former Delta soldier and Cleaner Owen is a highly skilled operative. Owen is an expert with multiple firearms and in unarmed combat. His skills in close combat allow him to quickly take out trained operatives.
He is currently in a relationship with Alexandra as well as her body guard after he rejoined Team Nikita and helped them put an end to The Group.