Pll season 7 overview!

7x03 The talented Mr. Rollins

Synopsis: Still reeling from the trauma of Hanna's abduction and dark fate, the Liars must shift their focus to another one of their own. In order to protect Alison from Uber A's threats, the PLLs snap into action at a chance to rescue her from the hospital. However, in doing so, they make a deadly mistake that changes everything.

Main cast:
Troian Bellisario as Spencer Hastings
Ashley Benson as Hanna Marin
Lucy Hale as Aria Montgomery
Shay Mitchell as Emily Fields
Sasha Pieterse as Alison DiLaurentis

Supporting cast:
Tyler Blackburn as Caleb Rivers
Keegan Allen as Toby Cavanaugh
Huw Collins as Elliott Rollins
Kara Royster as Yvonne Phillips
Lulu Brud as Sabrina

Featured music:
"New Ways" by Daughter - (Hanna dresses when Aria catches sight of the marks on her back, she questions her but Hanna avoid the questions as heads out to the living room to meet with the other girls)
"Secrets" by Laney Jones - (As they wait in line at The Brew, Emily announces to Hanna and Aria that Ashley offered a job; Aria offers her ear to Hanna; Emily thanks Sabrina for help then asks her out, Sabrina turns her down)
"Fingers Crossed" by Billie Eilish - (Spencer arrives and informs Caleb that Toby and Yvonne are engaged, then comments on rift that grown between them since Hanna disappeared; Caleb admits to Spencer that he and Hanna kissed)
"Cherry Life" by Polyenso - (Emily bar-tends at The Radley, she tries to call Toby then spots Sabrina seating in the lounge)
"Drift (feat. nilu)" by Robot Koch - (Emily brings over Sabrina's drink to her table, then tries to explain their previous conversation and why she took Ezra's key when Sabrina's date arrives)
"Buddy Boy" by Fort Lean - (Sabrina orders another drink from Emily then confesses that her lunch date was her ex-girlfriend and that she hasn't stopped thinking about since her confession then asks for a clean slate and a date)
"What You Want To" by Jake Etheridge - (Toby makes a toast to Yvonne at their engagement party when Emily
arrive; Emily pleads with Toby to look into Elliott and his connection to Mary then gives him Mary's file)

Episode storyline:
"Yvonne reveals to Spencer that she and Toby are now engaged. Toby discovers 'Elliott Rollins' is an alias, as he discovers that he received a moving violation in 1958; making him far too old. Emily gives Aria the keys to the DiLaurentis House, where she finds blue eye contacts, ingredients to make latex, a bunch of tools, and drugs that he had given to Alison. The first two were used to make the Wilden mask. Aria and Hanna visit an Amish community, where they meet Eliza, who was given dolls of The Liars from Charlotte. She also tells them about Elliott and Charlotte's affair. The Liars, more specifically Hanna, unintentionally hit Elliott Rollins with their car, killing him instantly. Additionally in this episode, there's a cameo of Sara Shepard's new book, "The Amateurs"."

Information from pretty little liars Wikipedia.