Pretty Little Liars

In the Pretty Little Liars summer finale, viewers will finally get some answers about who killed Alison.

"Viewers will feel they're getting insight into the night Alison disappeared and who killed Alison," executive producer Marlene King tells TVGuide.com. "The jaw-dropping moments are those revelations."

But this is Pretty Little Liars, and King adds, "The finale answers more questions than any other finale we've ever done -- but it raises a few big questions."

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Tuesday's episode (8/7c on ABC Family) begins with the last 10 minutes of the episode where the four friends, Aria (Lucy Hale), Spencer (Troian Bellisario), Hanna (Ashley Benson) and Emily (Shay Mitchell) are at the Rosewood police station, covered in dirt. Ironically, when the Pretty Little Liars teaser poster for Season 2 was released, little did viewers know that it would reveal a major plot point from the summer finale. "The poster came first and then we thought, 'How can we get those pretty girls in those pretty dresses dirty?" King says. The episode then flashes back to 12 hours earlier, as the girls arrive at Dr. Sullivan's office to find that she's missing. So does A's text that "The Dr. is out" mean Dr. Sullivan (Annabeth Gish) is a goner?

"Spencer's line about the last time somebody thought she knew A she got hit by a car is very telling about the fate of Dr. Sullivan," King teases. And while it seems hard to believe that a smart woman would work late alone in her office after two break-ins, King adds, "We make it clear that the Pretty Little Liars did not tell her everything about A and withheld a lot of information. If they told her about Hanna getting hit by the car and the more dangerous things, she would've insisted they go to the police. So they told her just enough to make her concerned, but not concerned for her life."

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In other finale developments, Hanna's dad, Tom (Roark Critchlow), gets married, dashing Hanna's hope of seeing her parents back together and linking her to wicked stepsister Kate (Natalie Hall). While King says we will see more of Kate and her mom Isabel in the second half of Season 2, it doesn't necessarily mean it's because the wedding went off without a hitch. "A becomes the ultimate frenemy once again, putting the Pretty Little Liars in a position where she helps them and hurts them simultaneously," King says. "The last thing Hanna wants is her dad to marry Isabel and in a very odd twist of fate, A may help her with that."

See photos from Pretty Little Liars

Look also for the return of a few Rosewood faces. Maya (Bianca Lawson) showed up in the penultimate episode and the finale will define where her and Emily's relationship stands and where it will go. Caleb will return from his trip to California and "Haleb" fans will be happy to hear that King says, "They'll get their share of bliss and you'll see them happy for a while." And finally, there's Officer Darren Wilden (Bryce Johnson), who we last saw in Season 1's "The Perfect Storm." The shady detective is back for the second half of Season 2 after King says, "He regains credibility on the Rosewood police force in the finale." Let's just hope that "credibility" isn't at the expense of one of our PLLs.

Watch a clip from "Over My Dead Body" below:

Make sure to check back after Tuesday's episode when we have the answers to the finale's burning questions.