Chip is arrested for his crimes after the girls courageously come forward.
Just as things seem peaceful, Archie escapes police custody. He murders Chip in a gruesome fashion before heading toward the girls' homes, proving that while the "Original Sin" mystery is solved, the slasher is still on the loose. Pretty Little Liars: Original Sin S01E10 FINAL ...
The finale delivers a dual reveal. is the mastermind behind the "A" persona, but he didn't act alone. The physical brute stalking the girls is his son, Archie Waters . Chip is arrested for his crimes after the
The episode leans heavily into its slasher roots as Imogen, heavily pregnant, has to face Archie in a high-stakes pursuit through the school. The finale delivers a dual reveal
"Final Girl" effectively transitions the franchise from a teen soap-mystery into a legitimate horror-slasher. It ties up the 1999 mystery while leaving enough blood on the floor to fuel the second season, Summer School .
In a brutal showdown, Imogen manages to overpower Archie, proving herself the ultimate "Final Girl." The Aftermath and the "A" Cliffhanger The finale ends with a mix of closure and new nightmares: