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 US soil under the code name "Oleander", having been investigated by the FBI. Sometime in his life, he had his daughter Katarina Rostova with an unknown woman. 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.
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 searching for answers.
- Dom addresses his granddaughter Elizabeth Keen by her birth name Masha.