

Spencer and Mona broke into the institution under the disguise of nurses while Caleb and Hanna eased them through security using the computer software. In order to clear Spencer’s name, the group hatched a plan to break into Radley and get Bethany Young’s files. An affidavit sent out by Detective Holbrook revealed that they believed Alison was innocent in the murder of Bethany Young … but that Spencer wasn’t. And even though she didn’t actually sell anyone out, the police asked suspicious enough questions for the Liars to realize that they have a big problem on their hands. The girls and Caleb hacked into the police database to see what Alison told them.

That left only one option – turning to Mona for help.

With Alison gone rogue, the Liars feared their former friend would turn them in to the police. The summer finale for “Pretty Little Liars” aired on ABC Family on Tuesday – forcing fans to say a permanent goodbye to one major character. The "Pretty Little Liars" Season 5 summer finale had a shocking and deadly ending.
