Season 1
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 in season one of the enthralling new series based upon the New York Times bestselling series by Sara Shepard.
Episodes
1 Pilot Jun 8, 2010 
2 The Jenna Thing Jun 15, 2010 
3 To Kill a Mocking Girl Jun 22, 2010 
4 Can You Hear Me Now Jun 29, 2010 
5 Reality Bites Me Jul 6, 2010 
6 There's No Place Like Homecoming Jul 13, 2010 
7 The Homecoming Hangover Jul 20, 2010 
8 Please, Do Talk About Me When I'm Gone Jul 27, 2010 
9 The Perfect Storm Aug 3, 2010 
10 Keep Your Friends Close Aug 10, 2010 
11 Moments Later Jan 3, 2011 
12 Salt Meets Wound Jan 10, 2011 
13 Know Your Frenemies Jan 17, 2011 
14 Careful What U Wish 4 Jan 24, 2011 
15 If at First You Don't Succeed, Lie, Lie Again Jan 31, 2011 
16 Je Suis une Amie Feb 7, 2011 
17 The New Normal Feb 14, 2011 
18 The Badass Seed Feb 21, 2011 
19 A Person of Interest Feb 28, 2011 
20 Someone to Watch Over Me Mar 7, 2011 
21 Monsters in the End Mar 14, 2011 
22 For Whom the Bell Tolls Mar 21, 2011