PRETTY LITTLE LIARS
THEORY
ABC
Family made the television series different than the books, but
used some of the same plot aspects. Like in the book Alison does
have a twin; however, in the television series the twin is Jenna.
Jenna is also A. During the Halloween episode Alison tells a scary
story about twin sisters where one twin stabs the other and is then
put into a mentalinstitution.
That story is actually the true story about Jenna and Alison. I
haven't figured out every detail yet (like how Toby fits into
the equation) but I know Alison did not know who Jenna was when
they met in the costume store (Alison introduces herself and Jenna
says "I know"). After a while Alison did figure it out
though. Someone sent Alison a doll and coincidentally a doll is
what caused the fight that prompted one twin to stab the other.
After Alison figured that out she deliberately threw that bomb into
the garage where Jenna was. Jenna eventually killed Alison. I
didn't instantly realize how much Alison and Jenna look alike
but after re-watching an episode I cannot believe I didn't see
it before!