Episodes
Episode: 1x01 | Airdate: Jun 8, 2010
The series premiere of a drama about four estranged friends reuniting because of mysterious messages that suggest their missing friend is watching them. First up: Each girl receives a message about a personal secret she wants no one else to know. Among those secrets: a father's affair; some shoplifting charges; an attraction to a sister's fiancé; and an attraction to a female neighbor.
Episode: 1x02 | Airdate: Jun 15, 2010
The circumstances surrounding Alison's disappearance continue to haunt Aria, Emily, Spencer and Hanna, as questions arise about the night she went missing. To complicate matters, Jenna's return to Rosewood makes the girls face an unpleasant past and an incident that sealed their friendship forever. Can the girls face what has taken place in their past, especially since "A" won't let them forget?
Meanwhile temptation is everywhere they look, as Aria tries her hardest to stay away from Ezra and Spencer won't shy away from her sister's fiancé, Wren.
Episode: 1x03 | Airdate: Jun 22, 2010
Det. Wilden looks for answers as he uses his connection to Hanna and Ashley to his advantage. Meanwhile, the girls honor Alison; Aria runs into her dad's ex-mistress; Spencer deals with Melissa's vengeance; and Emily sees a new side of Toby.
Episode: 1x04 | Airdate: Jun 29, 2010
The girls try to put an end to "A" by blocking unknown users in their e-mails and texts. Meanwhile, various surprises await them, including a gift from a potential love interest, unsolicited advice and unwarranted academic recognition.
Episode: 1x05 | Airdate: Jul 6, 2010
The girls deal with the repercussions of ignoring "A" and remain troubled by her lipstick message. Meanwhile, a new boy arrives on the scene; and various romances face challenges, thrive or remain in limbo.
Episode: 1x06 | Airdate: Jul 13, 2010
Some ugly secrets cast a shadow on the school's homecoming dance, and one girl's surprising date choice may complicate things for her. The band 2AM Club performs at the dance.
Episode: 1x07 | Airdate: Jul 20, 2010
The girls deal with the fallout from the homecoming dance as they mull over a secret about Toby. Meanwhile, Aria starts getting troubling text messages from someone besides "A."
Episode: 1x08 | Airdate: Jul 27, 2010
Alison's brother returns to town and thwarts the girls' plans for her memorial service. Meanwhile, Det. Wilden reappears on the scene; and Hanna's home life threatens her social status at school.
Episode: 1x09 | Airdate: Aug 3, 2010
The girls are stuck at school when a storm hits town on SAT day, and though the testing is postponed, the girls are still stressed about lingering personal problems. Elsewhere, Byron seeks parenting tips from Ashley as his marriage continues to crumble.
Episode: 1x10 | Airdate: Aug 10, 2010
The girls go on an upscale camping trip for a classmate's birthday party, and a text suggests that "A" may be in attendance as well. Meanwhile, the FBI comes to town after new evidence about Alison's case surfaces; and financial strains weigh on Ashley.
Episode: 1x11 | Airdate: Jan 3, 2011
Hanna is taken to the hospital in the wake of the hit-and-run, and her friends lean on each other and retrace everything that's happened to them since "A" entered their lives.
Episode: 1x12 | Airdate: Jan 10, 2011
Hanna mends in a wheelchair upon her release from the hospital. Meanwhile, Aria and Fitz think someone knows about their relationship; Spencer's romance with Alex hits a snag; and Emily invites Maya to dine with her family.
Episode: 1x13 | Airdate: Jan 17, 2011
"A" tempts Hanna to return to her old criminal ways. Meanwhile, Noel continues to go after Ezra; Emily's mother stops pretending to accept Maya; Spencer adjusts to her sister's marriage; and the girls get some surprising assistance.
Episode: 1x14 | Airdate: Jan 24, 2011
A wish comes true for one of the girls, but surprising consequences follow.
Episode: 1x15 | Airdate: Jan 31, 2011
Emily returns to the swim team and faces competition from a jealous teammate. Elsewhere, Aria and Ezra attempt to go on a date in public; and Spencer confronts an ugly part of her past when she asks Jason for some details about the night Ali died.
Episode: 1x16 | Airdate: Feb 7, 2011
Emily wants to swim the coveted anchor leg in a meet, but she has to battle Paige for it. Meanwhile, Hanna must repay Caleb for a favor; and Spencer has ulterior motives when taking on a tutoring job.
Episode: 1x17 | Airdate: Feb 14, 2011
Aria's father has a parent-teacher conference with Ezra. Elsewhere, one girl lets down her guard with an untrustworthy person; and a wrongly accused individual finds a friend.
Episode: 1x18 | Airdate: Feb 21, 2011
Stress takes its toll on the girls as they scrutinize suspects in Alison's murder, including a classmate with a grudge, a secretive brother-in-law and the ever-mysterious "A." Meanwhile, Aria uses the school play as a way to bond with Ezra.
Episode: 1x19 | Airdate: Feb 28, 2011
The police think the girls are fabricating stories when they make claims about Ian. Meanwhile, some clandestine relationships flourish, and others flounder.
Episode: 1x20 | Airdate: Mar 7, 2011
Spencer looks increasingly guilty. Meanwhile, the girls realize that other people in town are keeping secrets.
Episode: 1x21 | Airdate: Mar 14, 2011
Off. Reynolds keeps a close watch on the girls as Rosewood celebrates Founders' Day. Meanwhile, the girls hide their feelings and the status of certain relationships, such as Hanna's love for the boy who broke her heart and Spencer's friendship with Toby.
Episode: 1x22 | Airdate: Mar 21, 2011
In the first-season finale, the girls recruit an unexpected ally to assist them in stopping "A."