An astronomer becomes obsessed with searching the cosmos for signs of life beyond Earth which leads to a shocking discovery.

Based on the Pretty Little Liars series of young adult novels by Sara Shepard, the series follows the lives of four girls — Spencer, Hanna, Aria, and Emily — whose clique falls apart after the disappearance of their queen bee, Alison. One year later, they begin receiving messages from someone using the name "A" who threatens to expose their secrets — including long-hidden ones they thought only Alison knew.

Rosewood is a perfect little town with a great many secrets, the ugliest of which belong to the four prettiest girls in town: Aria, Spencer, Hanna and Emily, friends whose darkest secrets are about to unravel. One year ago, Alison, the Queen Bee of the group, disappeared, and the girls stopped being each other's BFFs. Now they start getting messages from "A" saying things only Alison would know. "A" spills their secrets, watches their every move and makes some very scary threats. The girls reunite to discover what's going on: Is Alison back or is "A" someone else altogether? Share the mystery with the complete Season One of the enthralling new series based upon the New York Times bestselling series by Sara Shepard.

Season two begins moments after the explosive season one finale and the girls are the talk of the town. Surprises and challenges will be in store for each, and "A" may succeed in her quest. Emily, Hanna, Spencer, and Aria are crumbling under the constant pressure of A's relentless texts and the knowledge that A inexplicably knows every little detail of their lives, including their thoughts, and is watching and anticipating the girls' every move. Spencer's family is falling apart. Aria and Ezra's relationship gets even more complicated, and Aria's brother Mike finds himself in trouble with the law, while their parents find themselves tested like never before.

La Tercera temporada de la serie de televisión estadounidense de drama adolescente, misterio y suspenso Pretty Little Liars, se estrenó oficialmente el 5 de junio del 2012 y termino su emisión el 19 de marzo del 2013.

La Cuarta temporada de la serie de televisión estadounidense de drama adolescente, misterio y suspenso; Pretty Little Liars, se estrenó oficialmente el 11 de junio del 2013 y su emisión se finalizó el 18 de marzo del 2014.

Comienza momentos después de haber escapado con vida de la cabaña en llamas, gracias a la intervención de "Abrigo Rojo". Spencer, Hanna y Mona afirman que la verdadera identidad de abrigo rojo y por lo tanto, quien las ayudo, es nada menos que Alison Di laurentis, lo que deja a las mentirosas cuestionarse nuevamente si su antigua amiga realmente murió. Por si esto no fuera suficiente, la disolución de parte del equipo A: Mona, Toby y Spencer (quien se unió al grupo brevemente), han "provocado" al resto de los miembros del tenebroso clan, quienes comienzan a expandir sus objetivos al comenzar a atormentar a Mona y a los seres queridos de las chicas. Adicionalmente, un par de detectives de la policía de Rosewood: Gabriel Holbrook y la teniente Linda Tanner, han posado su interés por resolver los homicidios del oficial Garret Reynolds y el detective Darren Wilden, con el fin de descubrir el vínculo entre estos crímenes y la desaparición de Alison.

La quinta temporada se dirigirá en las mentirosas ajustándose a un nuevo mundo en el que Alison está muy viva. El show también lidiara en como el grupo ha cambiado desde la desaparición de Alison y como su amistad será más desafiante. Kenneth y Jason DiLaurentis regresarán al show, cada uno lidiando personalmente con el regreso de Alison. El regreso de Alison presentará problemas para algunas relaciones románticas existentes, incluyendo un triangulo amoroso entre Emily, Paige y Alison.

The girls may have gotten out of the Dollhouse but what happened to them during their time of captivity has lasting effects. With worried loved ones watching over them, the PLLs are home and trying to heal, with not much success. Even with suspected tormentor Andrew in custody, Aria, Emily, Hanna and Spencer fear they are far from safe. Meanwhile, Alison must deal with her past indiscretions and her notoriety around Rosewood.

After Hanna's shocking abduction by "Uber A", the PLLs and company desperately race against the clock to save one of their own. The only way to do this is by handing over evidence of Charlotte's real murderer to "Uber A". In order to do so, the girls must decide what blatant lines they are willing to cross that they have never breached before; and once they cross that line, there is no turning back.