With The Blacklist airing for 10 seasons on NBC, some seasons are inevitably stronger than others. The show's debut in 2013 introduced the charismatic and mysterious Raymond Reddington (James Spader) to the world, and Spader continued to play the character across all 218 episodes. Spader's performance solidified Reddington as a great television character, and Reddington's story was further elevated by the cast of characters surrounding him.