She decides to make up with Spencer, however, even telling her the unborn baby's name, Taylor.
She also discovers that Toby, much to her dismay, has a new job with the Rosewood construction company;— so that he can be free of his parents with the money he earns;— only to be let go on his first day due to a conflict with the clients over Toby's reputation.
Spencer tries to find out what Jason is up to, only to be interrogated by Jason about Ian's apparent death.
When they follow Melissa, they discover Ian's dead body, along with a suicide note, admitting that he killed Alison, however the girls later discover that Ian's suicide note was A-orchestrated and that it wasn't Ian who killed Alison. The second half deals with the girls being more determined to find out who 'A' is. The plan had moderate success as the girls were able to steal A's phone.
They also discover that Garrett can not be trusted after finding out his connection to Jenna. The girls (except Hanna) enlists Caleb's help on hacking to A's phone; however, A tries to shut down the phone, but before A shuts the phone, they were able to discover some clues.
PRETTY Little Liars has finally revealed the identity of A. Alex explained to Spencer how she met her ex Wren in a pub in London and he explained everything about her family in Rosewood.
The evil manipulator was unveiled as Spencer Hasting's secret twin sister Alex Drake after the British psychopath kidnapped her sister and confronted her in her secret lair.
"I still don't know why but I started to cry," Alex said as she admitted to being driven mad by the news after becoming embroiled in a relationship with Wren.
Originally going to Rosewood to discover who had murdered her psychotic half-sister Charlotte, after she exposed Mona for the crime, she stuck around impersonating Spencer and began to ruin the Liars' lives.
"I know this isn't fun for you but this is very exciting for me, you see I've been dying to meet you," she said as she confronted Spencer in her bunker.
After twists and turns that showed Alex had an entire underground complex recreating Rosewood to hold the Liars in while she tortured them.
Caleb explains that he wrote her a letter and gave it to Mona, who threw it away.