Someone is threatening to bring D.C. down with the use of a big book of sex secrets, and Olivia and the gladiators will waste no time in stopping the menacing woman from telling the world of the deepest, darkest secrets of the city's leaders. In episode 16 of "Scandal" season 4 called "It's Good to be Kink," Olivia squares off with an innocent-looking character, to be played by Lena Dunham of HBO's comedy-drama original "Girls."

Dunham is a huge fan of the political thriller television series, and her dream to participate in her favorite show is finally coming to fruition. As Carter Matt noted, "It's Good to be Kink" sets up Dunham's character to face Olivia. In fact, her character in "Scandal" is even a fangirl of the latter.

"Oh my God. You are Olivia Pope," Dunham's character excitedly tells her idol.

After a moment of excitement and when she realizes that Olivia is not there to sign an autograph, Dunham becomes immediately worried and asks, "Hold on. Am I in trouble?" 

Portia De Rossi is also set to reprise her role as Elizabeth. Her chunk of the story focuses on Mellie's sister Harmony and the possible damage she is capable of doing. Susan Ross is close to becoming the next vice president and Fitz is doing everything for her to get to the spot. Mellie has so much on her hands right now. Her sister totes up the whole disaster. 

"For Harmony to come to the White House is Mellie's personal Armageddon," Bellamy Young, who portrays the role, told Entertainment Weekly. "Mellie is paddling so hard to make people believe that she is who she is pretending to be right now and all the water just falls away and she's fully exposed for who she is, where she came from and what's really inside of her. That's the most terrifying thing to Mellie. It is not pretty." 

"Scandal" season 4 episode 16, "It's Good to be Kink," will air on March 19.