According to The Blacklist Wiki , Alexander Kirk (born ) is:
: While the team believes they are seeking justice for Liz, Reddington’s hunt for Kirk is fueled by a deep, shared history that remains largely obscured. [S3E22] Alexander Kirk
: He suffers from a rare blood disorder (aplastic anemia) and believes he needs a biological relative—specifically Liz (Masha)—for a life-saving transplant. According to The Blacklist Wiki , Alexander Kirk
: A powerful Russian oligarch and the former husband of Katarina Rostova. According to The Blacklist Wiki
The episode follows Raymond Reddington and the Task Force as they launch a desperate, off-the-books mission to take down Alexander Kirk, the billionaire financier responsible for the tragic events surrounding Liz Keen's apparent death.