Nikita Reznikov
Portrayed by Daniel J. Travanti
IMG 0278
Episode Count
First Appearance
Reznikov N.
Last Appearance
Nikita Aleksandr Reznikov Konstantine Chernoff
Hair Color
KGB Major (Gulag Prisoner (formerly)
Family Members
Clara Callen (wife) ✝️
Amy Callen (daughter) ✝️
Grisha Callen (son)
Alexandra Reynolds (daughter)
Jake Reynolds (grandson)
Major Nikita Aleksandr Reznikov is the Russian father of G. Callen and Amy Callen. He was a major in the KGB but was arrested in 1974 for helping Soviet civilians escape to the West. He was sent to a gulag camp in Siberia. He later escaped and changed his name to Konstantine Chernoff. In Matryoshka he finally met G. Callen and revealed to Callen his birth name, including his full first name Grisha.

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.