In Glasnost, Callen was forced to interrogate him due to his connection to Katerina Pulonin, a woman he had helped settle in the U.S. and also had relations with. During this time, he revealed to Callen that Alexandra Reynolds was his daughter and Jake Reynolds his grandson.
In Old Tricks, he kidnapped Pacey Smith, the father of Jake Reynolds, on suspicion of being a drug dealer, when Callen found him, getting the information from Pacey that he was an L.A.P.D. informant. Later, he and Callen showed up at Alexandra's door, ready to tell her of her remaining family, when she invited them in for dinner.
After living for some time in LA and forming relationships with his children and grandchild, Reznikov’s visa was revoked and he was taken in to state department custody in order to be used by the US in a three-way deal with Iran and Russia in order to free an American couple from Iran. Callen’s team tried to apprehend an acceptable alternate target and, when that failed, Callen tried to convince his father to escape through the trap door in the Boatshed’s interrogation room, but Reznikov stated that he’d rather be used to being another family together than be a fugitive and make Callen an accessory.
At the prisoner exchange, Reznikov appeared resigned to his fate and happy to see the other family reunited, which he glimpsed when turning to enter a van. Before the exchange, he told Callen he may use the alias “Igor” if he escapes.