After tonight's shocking episode, new "Scandal" spoilers reveal what to expect next week. A surprise visitor will reveal insider information that could take down the White House and destroy Pope & Associates. Read on for more "Scandal" season 4, episode 15 spoilers and synopsis.

"Scandal" season 4, episode 15 is titled "The Testimony of Diego Munoz" and will air Thursday, March 12.

The synopsis reveals some juicy spoilers that could put the White House and Olivia Pope in danger: "David Rosen is caught off guard when a surprise visitor reveals insider information about B613 that could take down the White House and destroy Pope & Associates on "Scandal," THURSDAY, MARCH 12 (9:00-10:00 p.m., ET) on the ABC Television Network. "Scandal" stars Kerry Washington as Olivia Pope, Guillermo Diaz as Huck, Darby Stanchfield as Abby Whelan, Katie Lowes as Quinn Perkins, Tony Goldwyn as President Fitzgerald Grant, Jeff Perry as Cyrus Beene, Bellamy Young as Mellie Grant, Joshua Malina as David Rosen and Scott Foley as Jacob "Jake" Ballard. Guest cast TBA. "The Testimony of Diego Munoz" was written by Mark Fish directed by Allison Liddi Brown."

Who do you think the surprise visitor is? What kind of information could be powerful enough to take down both Pope & Associates and the White House? Can Olivia Pope save the day? We'll have to wait until next week for more spoilers and information - hang tight, Gladiators!

"Scandal" season 4, episode 15 will air next Thursday, March 12 at 9pm on ABC.

Meanwhile, TV Guide reports that it may soon be time for Mellie to shine - as President of the United States. Just a few months ago, she was Smelly Mellie: grieving her son, while eating fried chicken and vodka in a robe. But now she might just be the next President on "Scandal."

"I never could've imagined when the season started that we would go down this path," Bellamy Young, who plays Mellie, told TVGuide.com. "That's the glory of Shonda [Rhimes] and our wonderful writers. But I think we needed her [grieving]. It was honest in a way she's never been. She usually put protocol above everything. I think that was a real breakthrough moment for her. She was just honest. I think that allowed her to go on the balcony and tell Fitz [Tony Goldwyn], 'I wanna be president of the United States. I wanna run the world.' That sort of honesty couldn't have happened without being forged in that horrible pain and fire."

In the meantime, Young promises that we'll get to know more about Mellie's background in upcoming episodes.