Who killed alison in pretty little liars

Since Pretty Little Liars premiered in 2010, the girls have been terrorized by a series of shadowy figures going only by the letter A.

First there was Mona, who used her time as A to enact revenge on Alison for making her high-school years a living hell, then there was CeCe/Charlotte, who was upset with the entire DiLaurentis family for locking her away in Radley.

Now that Charlotte’s dead, the Liars are contending with another villain known as Uber A, but there have been so many detours and red herrings along the way that it’s hard to keep track of who was A at what time and why. Here’s an exhaustive guide to help you remember everything that’s gone down in Rosewood since that fateful day when the Liars got their first A texts.

Season 1

One year after Alison DiLaurentis goes missing, Spencer, Aria, Emily, and Hanna begin receiving messages from someone named ‘A.’ They initially believe that it could be Ali herself, who at the time has still not been declared dead, but after Maya’s family discovers Ali’s remains in their

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