Executive producer I. Marlene King tells THR about the episode's "A" shocker, the "closure" surrounding Mona's death and whether the show will keep going beyond season seven.

Rest assured, Pretty Little Liars fans: Answers are on the way on Tuesday's season-five finale. But viewers may need to brace themselves for what's in store.

This has been a wild season for Rosewood's denizens, as our heroes have continued to deal with the aftermath of Mona's (Janel Parrish) death. Last week's episode of the ABC Family drama saw Alison (Sasha Pieterse) being found guilty of first-degree murder, while Spencer (Troian Bellisario), Aria (Lucy Hale) and Emily (Shay Mitchell) all were hauled off to join Hanna (Ashley Benson) in the slammer. Bad times.

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PLL creator and executive producer I. Marlene King tells The Hollywood Reporter that the finale is the "most important episode of Pretty Little Liars that we have produced to date. It really is a game-changer for us."

"We are definitely seeing a big 'A' reveal in the episode, and it is a reveal that will definitely tell you in a certain way who 'A' is," says King, promising constant goose bumps. "It's something I've never seen on television before. ... It's shocking and provocative and disturbing." She adds that the finale launches an 11-episode path to wrap up the general storyline that has been unfolding since season one.

Some fans have questioned whether Mona is really dead and if she might pop in on the Liars during the finale. "I know everybody's saying, 'No body, no crime,' " admits King. "In the next two episodes, you will definitely get closure on who or what was in the barrel, and a body will surface."

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The episode won't feature any romantic moments between Emily and Alison, which is likely to disappoint the many fans who are hoping for more "Emison" sparks. But it will see the three primary significant others — Caleb (Tyler Blackburn), Ezra (Ian Harding) and Toby (Keegan Allen) — putting their differences aside and "working together to bring their girls home."

King says that just four of the castmembers have been told who "A" is: three of the Liars (Hale doesn't want the pressure of knowing!) and Allen. But a number of fans actually are on the right track with their predictions. "So many people are getting so close — it's so exciting," reveals King. "In my perfect world, a lot of people figure it out before we give you that absolute, definite closure."

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PLL is renewed for two more seasons, but that isn't necessarily the end of the road. "I'm happy to go for as long as fans want to see the show — and for as long as we can continue to tell really fun and exciting stories," says King.

However, as far as the short term is concerned, King is not worried about fans' responses to the upcoming developments: "I'm 100 percent confident that we're going to see all positive reaction to this episode — after jaws are picked up from the floor."

Pretty Little Liars' season-five finale airs March 24 at 8 p.m. on ABC Family. Pretty Little Liars: The Complete Fifth Season will be available on DVD on June 2.

Email: Ryan.Gajewski@thr.com

Twitter: @_RyanGajewski