| Season Number: | 1 |
| Bgcolour: |
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| Num Episodes: | 22 |
| Network: | ABC Family |
| Next Season: | Season 2 |
| Episode List: | List of Pretty Little Liars episodes |
The first season of Pretty Little Liars, based on the books of the same name by Sara Shepard, premiered on June 8, 2010 and concluded on March 21, 2011 on ABC Family.
The show premiered to 2.47 million viewers and retained a regular audience of 2.5 million viewers during its summer run. The summer finale scored 3.07 million viewers, achieving a series high. The show went on hiatus and returned with its winter premiere on January 3, 2011, with 4.20 million viewers, becoming one of ABC Family's top telecasts to date.
Set in the fictional town of Rosewood, Pennsylvania, Spencer Hastings, Aria Montgomery, Hanna Marin, Emily Fields, and Alison DiLaurentis' lives are irrevocably changed after their clique leader Alison "Ali" goes missing during a sleepover. The four remaining girls forever believe their secrets are safe for all time, but the absence of one of their leaders makes them drift apart. One year later, the former group of friends are forced to reunite after their once-missing friend is discovered dead, and they begin receiving threatening texts from someone named "A," who utilizes secrets that only their dead friend would know to terrorize them. Knowing that if their secrets are out, it will jeopardize them and their futures, the girls decide to team up and figure out who is behind the mask.
See also: List of Pretty Little Liars characters.
See also: List of Pretty Little Liars episodes.
Originally developed as a television series by book packaging company Alloy Entertainment, the idea was described as "Desperate Housewives for teens."[2] Alloy met with author Shepard, and gave her the property to develop into a book series.[2] With Alloy and Warner Horizon interested in producing a Pretty Little Liars television series for years, it was first planned for The WB in 2005 with a different writer.[3] The first novel was published by HarperTeen in October 2006.[4] In June 2008, Alloy noted that it was developing a Pretty Little Liars television pilot for ABC Family.[2] The novels are being adapted for television by I. Marlene King.[3] The series' pilot was filmed in Vancouver in December 2008. Filming for the series moved to Los Angeles from the second episode onward.
ABC Family began casting for a Pretty Little Liars television pilot in October 2009.[3] Lucy Hale was cast as Aria Montgomery in the project,[3] followed by Troian Bellisario and Ian Harding (as Spencer Hastings and Ezra Fitz, respectively) in November 2009.[5] In December 2009 The Futon Critic confirmed the casting of Ashley Benson as Hanna Marin and Shay Mitchell as Emily Fields, as well as the addition of Laura Leighton as Ashley Marin, Alexis Denisof as Byron Montgomery, Bianca Lawson as Maya, as well as Jean Louisa Kelly and Nia Peeples.[6] [7] The Hollywood Reporter also noted that Torrey DeVitto and Sasha Pieterse landed recurring roles in the pilot.[7]
The Alloy website later confirmed that Pieterse would be playing Alison DiLaurentis and DeVitto would be Melissa Hastings, also noting Janel Parrish as Mona Vanderwaal and Cody Allen Christian, as Mike Montgomery.[8] In April 2010, Chad Lowe replaced Alexis Denisof as Aria's father, Byron Montgomery.[9] Also in April, Holly Marie Combs was cast as Ella Montgomery.
| No. in series | No. in season | Episode | Air date | Time slot (EST) | Rating/Share (18–49) | Viewers (m) |
|---|---|---|---|---|---|---|
| 1 | 1 | "Pilot" | Tuesdays 8:00 p.m. | 0.9 | 2.47 | |
| 2 | 2 | "The Jenna Thing" | 1.0 | 2.48 | ||
| 3 | 3 | "To Kill a Mocking Girl" | 1.0 | 2.74 | ||
| 4 | 4 | "Can You Hear Me Now?" | 0.7 | 2.08 | ||
| 5 | 5 | "Reality Bites Me" | 1.0 | 2.62 | ||
| 6 | 6 | "There's No Place Like Homecoming" | 0.9 | 2.69 | ||
| 7 | 7 | "The Homecoming Hangover" | 0.9 | 2.55 | ||
| 8 | 8 | "Please, Do Talk About Me When I'm Gone" | 0.9 | 2.52 | ||
| 9 | 9 | "The Perfect Storm" | 0.9 | 2.55 | ||
| 10 | 10 | "Keep Your Friends Close" | 1.1 [10] | 3.07 | ||
| 11 | 11 | "Moments Later" | Mondays 8:00 p.m. | 1.5 | 4.20 | |
| 12 | 12 | "Salt Meets Wound" | 1.1 | 3.21 | ||
| 13 | 13 | "Know Your Frenemies" | 1.2 | 2.99 | ||
| 14 | 14 | "Careful What You Wish For" | 1.2 | 3.17 | ||
| 15 | 15 | "If at First You Don't Succeed, Lie, Lie Again" | 1.2 | 3.19 | ||
| 16 | 16 | "Je Suis Une Amie" | 1.1 | 3.14 | ||
| 17 | 17 | "The New Normal" | 0.9 | 2.35 | ||
| 18 | 18 | "The Bad Seed" | 1.0 | 2.90 | ||
| 19 | 19 | "A Person of Interest" | 1.0 | 2.69 | ||
| 20 | 20 | "Someone to Watch Over Me" | 1.1 | 2.95 | ||
| 21 | 21 | "Monsters in the End" | 1.1 | 2.94 | ||
| 22 | 22 | "For Whom the Bell Tolls" | 1.3 | 3.64 |
| The Complete First Season | |||||
| Set details[11] | Special features | ||||
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| Release dates | |||||
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