Roman Nevikov (played by Garret Dillahunt) is a ruthless Russian mobster and human trafficker based in Los Angeles. Supposedly, Nevikov was born in prison, and exhibits extreme sociopathic tendencies. Cool, calm, and extremely confident, Nevikov always seems to know specific and private details about those he interacts with (particularly Charlie Crews and Dani Reese). Those who work for him fear him as being untouchable. This is proven when Nevikov, having murdered one of his prostitutes and been subsequently arrested by Crews and Reese, is released without charge when it is revealed that he is a protected federal informant.