"For Whom the Bell Tolls" is the season finale of the first season of the American mystery-drama series Pretty Little Liars, based on the novels written by Sara Shepard, and the twenty-second episode of the series overall. It originally aired on ABC Family in the United States on March 21, 2011. The episode was directed by Lesli Linka Glatter and written by I. Marlene King. In the episode, the girls plan to expose Ian as Alison's murderer after finding video files of them changing in their rooms. Meanwhile, each of the girls deals with setbacks in her personal life. The episode drew 3.64 million viewers, garnering a 1.3 rating in the 18–49 demographic. It ranks as the season's second-highest-rated episode. The episode has also garnered positive reviews from critics, many who offered praise to Brendan Robinson's character, Lucas Gottesman. Plot Spencer (Troian Bellisario), Hanna (Ashley Benson), Aria (Lucy Hale), and Emily (Shay Mitchell) watch Ian's (Ryan Merriman) videos on the flash drive they recovered from the storage unit, which feature them, Alison (Sasha Pieterse), Jenna (Tammin Sursok) and Toby (Keegan Allen) being unknowingly filmed. The girls confront Jenna about the video of her and Toby. She tells them of the day Alison came to visit her in the hospital and how she threatened her with the video. The girls promise to keep the videos safe in exchange for the information. They later conclude that Jenna felt safe to return to Rosewood after Alison disappeared. The girls then plot to expose Ian, using a burner phone to send text messages demanding money in exchange for the videos. In the girls daily lives, Hanna is still reeling from her breakup with Caleb, while Mona (Janel Parrish) covers her tracks after destroying Caleb's letter. Lucas (Brendan Robinson) catches on and brings Caleb (Tyler Blackburn) back to Rosewood. Spencer has issues with Melissa and Ian's pregnancy. Aria and Ezra celebrate as Ezra finalizes his transfer to Hollis, but his ex-fiancé (Paloma Guzman) appears at the Montgomery house, furthering Aria's suspicions about their previous relationship. Emily learns that she and her mother are moving to Texas to be with her father. Hanna, Aria, and Emily meet at Willow Park with Officer Garret Reynolds (Yani Gellman) to corner Ian. They instead encounter a messenger (Tilky Jones) sent to deliver the demanded money. Meanwhile, Spencer drives her sister from the church but they get into a crash.