Jon Bokenkamp Creator, Executive Producer, Writer James Spader Raymond "Red" Reddington Actor, Executive Producer Megan Boone Elizabeth "Liz" Keen Actor Diego Klattenhoff Donald Ressler Actor Amir Arison Aram Mojtabai Actor Hisham Tawfiq Dembe Zuma Actor Harry Lennix Harold Cooper Actor Laura Sohn Alina Park Actor Ron Raines Dominic Wilkinson Guest Star Brett Cullen Ilya Koslov Guest Star David E. Harrison Ivan Stepanov Guest Star Lotte Verbeek Katarina Rostova Guest Star Reg Rogers Neville Townsend Guest Star Colin Bates Real Reddington Guest Star Laila Robins Tatiana Petrova Guest Star Adam Harper Young Constantine Rostov Guest Star C.J. Wilson Young Dominic Wilkinson Guest Star Gabriel Mann Young Ilya Koslov Guest Star Aria Kane Young Liz Keen Guest Star Madeline Hoarle 12-Year-Old Katarina Guest Star Scott T. Schofield Created Reddington Guest Star Lukas Hassel Vandyke Guest Star Marty Lawson Townsend's Man Guest Star Zoey Deel 17-Year-Old Katarina Guest Star Roberts Jekabsons Flannel Merc Guest Star John Eisendrath Executive Producer, Writer John Davis Executive Producer John Fox Executive Producer Lukas Reiter Executive Producer, Writer J.R. Orci Executive Producer Laura Benson Executive Producer Kurt Kuenne Director