"Scandal" Season 4 Episode 15 Spoilers - In the previous episode of the ABC series "Scandal," fans caught an interesting glimpse of Olivia's PTSD while another White House crisis transpired. And in this week's episode, the intriguingly action-filled and scandalous turn of events continue.

Before "Scandal" Season 4 Episode 15 tonight, last week's episode was the show's most powerful episode of the season, as we previously shared. After Olivia Pope's abduction ordeal sparked concerns on her mental strength, Liv continued her struggles to move on despite experiencing tremors, which indicated post-traumatic stress disorder.

As Olivia and her gladiators face a new challenge in "Scandal" Season 4 Episode 15 titled, "The Testimony of Diego Munoz," the revelation of some dreadful secrets will threaten to destroy them. According to Yibada, the show will be moving forward with its B613 plot.

As challenging situations emerge for White House staff this week, Olivia will collaborate with Huck and Quinn. As Ecumenical News shared, David Rosen will be in trouble as he welcomes an unexpected guest, who will make some surprising revelations.

The unforeseen visitor will divulge some significant B613 information, which is so dangerous that could lead to the destruction of Olivia, the White House and the rest of the gladiators, Christian Today revealed. While sinful past catches up that will place everyone's future in great peril.

"David Rosen will get caught off guard when a surprise visitor reveals insider information about B613 that could take down the White House and destroy Pope & Associates," "Scandal" Season 4 Episode 15 synopsis reads, as Hollywood Hills quoted.

As things become even more complicated in "Scandal" Season 4 Episode 15, Melty reported that Jake will try to prevent the leak about the existence and actions of B613 to the press, which might end Fitz's legacy. While Olivia urges the President to apologize and beg for forgiveness to the American people.

Meanwhile, TV Guide mentioned that it may soon be Mellie's time to shine in "Scandal" Season 4 Episode 15. Actress Bellamy Young is loving the whole dynamic between her character Mellie, husband Fitz and Olivia, as per KpopStarz.

"I hope that we're miserable forever. As long as Shonda wants to write the show, I want Fitz in love with Olivia and I want it to be uncomfortable," she said.

So, what should you look forward to in "Scandal" Season 4 Episode 15? Well, watch the teaser below ad tune in to ABC tonight, March 12 at 9 p.m.