Not much is known about Dominic Wilkinson' past aside from the facts that he was born in Russia and that he is a notorious KGB agent that operated in the United States under the code name “Oleander”, having been investigated by the FBI. Sometime in his life, he had his daughter Katarina Rostova with Virginia Loving. Dom trained Katarina to be a KGB agent just like him and, as her handler, Dom assigned to Katarina the mission to seduce and spy on Raymond Reddington. Following the end of the Cold War, Dom moved to a reclusive house in the United States and assumed the identity of Dominic Wilkinson, a retired systems analyst, and cut down all ties with his family to protect them from reprisals. When it was discovered that Katarina Rostova betrayed the KGB for the Cabal, Dom helped his daughter to escape from Russia and disappear. However, 1 year later, following the formation of the Townsend Directive, Dom tried to kill Katarina with a car bomb in Belgrade in order to keep his granddaughter Masha safe from the Directive, but he failed and killed Katarina´s new husband instead.
Dom is among the very few who know that Raymond Reddington is not the real Raymond Reddington, but an imposter who took over his identity over 30 years ago. As much as Dominic despises him, he has shown to care for Red, as he respected his wishes in not letting his granddaughter know what happened to her mother.
He met his granddaughter Elizabeth for the first time, though he didn't divulge his true identity to her. However he did share on how he knew her mother Katarina. After she left, Dom called Reddington to inform him of Elizabeth's visit, in the end he expressed his frustration on having seen his granddaughter for the first time in 30 years without informing her of who he is. Dominic also warned him to stop being evasive and tell her the truth about what he did, to which he hung up on him.
After recovering the duffle bag of bones, Red returns to Dom's cabin with Dembe. Dom watches as Reddington burns the bones of what is revealed to be the real Raymond Reddington who had been killed and replaced decades before by the imposter known as Raymond Reddington. Aware of the man's secret, Dom warns that while Liz may not know his secret, she knows he has one and will never stop till she discovers it. However, Dom, Dembe and Raymond are unaware that Liz has already learned the truth, that Raymond is not the real Raymond Reddington.
He is seen on a Post Office photo.
Ressler confessed to Elizabeth that he went behind her back and continued looking into the real identity of Raymond Reddington. He then showed her what he thought was a dead-end (the Post Office photo of Dom).
Elizabeth went to see Dom the next day, asking him to say hello to his granddaughter.
Dom gives Elizabeth fresh mint tea and tells her the story of what happened to Katarina after her attempted suicide in the ocean. She ended up in a women's shelter. Dom reveals that he gave up everything to protect Katarina.
Season 7 Edit
Liz learns from Katarina that Dom lied to her about who Red really is and that Dom is the one who wants her dead to protect Liz. Dom and the real Illya had conspired together to kill Katarina to protect Liz, and failed. Liz confronts Dom, still comatose and on a ventilator about his actions.
- Dom addresses his granddaughter Elizabeth Keen by her birth name Masha.
- Brian Dennehy passed away on 15 April 2020; from natural causes, not [coronavirus]-related as in an statement from his daughter.