Pretty Little Liars

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.

Directed by I. Marlene King, Pretty Little Liars leans on a strong ensemble — Lucy Hale, Troian Bellisario, Ashley Benson — to carry a story that balances spectacle with character.

The series landed with audiences for its craft and performances, and remains one of the most talked-about drama titles of 2010.