Keri Russell fans rejoice - The Diplomat is back, but is it better than ever, or coasting by on what made it so addictive in season one? The Netflix original series follows Russell's Kate Wyler, recently appointed United States ambassador to the United Kingdom, who faces struggles juggling her high-profile new job and her turbulent marriage to a prominent politician. Season 2 ended in a cliffhanger shocker that left fans craving more. Now the latest season is streaming, and it's one of Netflix's most popular shows right now.