La trama sigue la vida de cuatro amigas (Spencer, Hanna, Aria y Emily) tras la desaparición de Alison, la quinta del grupo. Un año después comienzan a recibir mensajes anónimos de alguien que se hace llamar A. Los mensajes amenazan con rebelar sus secretos, incluso algunos que sólo Alison sabía.
Guionista: I. Marlene King
Fecha de emisión: 2012-06-05
Duración: 42 min
Sinopsis: Approaching the second anniversary of Alison's disappearance, a shocking event rocks Rosewood.
Guionista: Oliver Goldstick
Fecha de emisión: 2012-06-12
Duración: 42 min
Sinopsis: One of Aria's past indiscretions is fodder for a new "A." and Emily recalls a crucial event from the night she lost her memory.
Guionista: Joseph Dougherty
Fecha de emisión: 2012-06-19
Duración: 42 min
Sinopsis: Spencer asks questions, but stumbles upon a larger secret, while Aria agrees to be Jenna's accompanist.
Guionista: Michael J. Cinquemani
Fecha de emisión: 2012-06-26
Duración: 42 min
Sinopsis: Visiting Mona is driving a wedge between Hanna and Caleb and Hanna is forced to weigh up how honest to be with him.
Guionista: Bryan M. Holdman
Fecha de emisión: 2012-07-10
Duración: 42 min
Sinopsis: Jenna throws a party to die for and the Liars are suspicious when Garrett is let out of prison to visit his mother.
Guionista: Maya Goldsmith
Fecha de emisión: 2012-07-17
Duración: 42 min
Sinopsis: A new clue could lead the girls down the wrong path. Emily remembers something new from the other night but the recollection suggests a very surprising suspect.
Guionista: Andy Reaser
Fecha de emisión: 2012-07-24
Duración: 42 min
Sinopsis: Hanna is worried that Detective Bryce is trying to frame her and the others turn to a very unlikely person for help.
Guionista: Joseph Dougherty
Fecha de emisión: 2012-07-31
Duración: 42 min
Sinopsis: Spencer asks Caleb for help. Aria learns about Ezra's past. Emily is worried about how Paige will be affected by everything "A" has done to her.
Guionista: Lijah J. Barasz
Fecha de emisión: 2012-08-07
Duración: 42 min
Sinopsis: After Spencer turns in desperation to Cece for help with her college application, she and Aria may find some answers at the Kahn brothers' party.
Guionista: Jonell Lennon
Fecha de emisión: 2012-08-14
Duración: 42 min
Sinopsis: A cabin may hold the key to Maya's secrets so Hanna and Emily do some snooping.
Guionista: Maya Goldsmith
Fecha de emisión: 2012-08-21
Duración: 42 min
Sinopsis: Paige's past comes back to haunt Emily. Aria gets a surprise from Ezra's past.
Guionista: I. Marlene King
Fecha de emisión: 2012-08-28
Duración: 42 min
Sinopsis: As the town becomes a media circus in the run-up to the new trial, the girls are betrayed by someone close to them.
Guionista: Joseph Dougherty
Fecha de emisión: 2012-10-23
Duración: 42 min
Sinopsis: Unexpected Halloween party guests pop up at every turn and The Rosewood Halloween Ghost Train becomes one killer party.
Guionista: Oliver Goldstick
Fecha de emisión: 2013-01-08
Duración: 42 min
Sinopsis: To the girls' dismay, Mona is headed back to Rosewood High. Aria, Emily, Hanna and Spencer take very different views of the "new" Mona.
Guionista: Bryan M. Holdman
Fecha de emisión: 2013-01-15
Duración: 42 min
Sinopsis: A battle of the brains stresses Spencer, Aria learns of reasons to suspect her father of foul play, Hanna confronts Lucas, and Emily gets a fright in the woods.
Guionista: I. Marlene King
Fecha de emisión: 2013-01-22
Duración: 42 min
Sinopsis: Ailing Aria has reason to be afraid, while Spencer’s romantic gesture results in an unpleasant surprise.
Guionista: Maya Goldsmith
Fecha de emisión: 2013-01-29
Duración: 42 min
Sinopsis: Distracted Spencer’s anger is let-loose on Ezra, hurting Aria. Emily and Hanna each end up at the police station.
Guionista: Lijah J. Barasz
Fecha de emisión: 2013-02-05
Duración: 42 min
Sinopsis: Emily’s memories get muddled in therapy, Caleb’s boyhood things intrigue Hanna, Ezra’s brother brings trouble, and Spencer gets bitter.
Guionista: Francesca Rollins
Fecha de emisión: 2013-02-12
Duración: 42 min
Sinopsis: Spencer’s misbehaviour causes concern, Hanna engineers an encounter Caleb is resisting, Emily’s detective work turns dangerous.
Guionista: Andy Reaser
Fecha de emisión: 2013-02-19
Duración: 42 min
Sinopsis: Det. Wilden seeks to silence those who know his secret, the heat is on for Spencer after reengaging with Wren, and Ezra’s mother tries a new angle of attack.
Guionista: Jonell Lennon
Fecha de emisión: 2013-02-26
Duración: 42 min
Sinopsis: Death stalks someone close to Spencer, while Hanna has evidence to ditch, and Aria finds baby-sitting awkward.
Guionista: Joseph Dougherty
Fecha de emisión: 2013-03-05
Duración: 42 min
Sinopsis: Spencer’s mental state deteriorates while her friends fret. A reappearance proves miraculous and ominous.
Guionista: Maya Goldsmith
Fecha de emisión: 2013-03-12
Duración: 42 min
Sinopsis: Some secrets of Mona’s asylum stay come to light, a corpse must be faced, and a lost child tracked down.
Guionista: I. Marlene King
Fecha de emisión: 2013-03-19
Duración: 41 min
Sinopsis: A turncoat’s betrayal is nothing compared to the deadly trap the liars are lured into hoping to see the face of their nemesis.
