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Not at all! A fan asked showrunner Marlene King if the episode would include any flashbacks, and she replied, "yes and it reveals big moment about the night Ali went missing."
This is good news and bad news. On one hand, it's always nice to know we're going to learn more. On the other hand, it means that even though the Season 3 summer finale (Season 3, Episode 12: “The Lady Killer”) answers two burning questions, it clearly won't clear up everything about the night Ali disappeared.
We have a feeling that's one mystery that will last a long, long time...
Catch an all-new episode of PLL on Tuesday, July 24 at 8 p.m. ET/PT on ABC Family.