Shane Coffey

In the aftermath of the dam break, massive mudslides wreak havoc throughout Los Angeles. As Athena fights to save herself and an agoraphobic woman after her house collapses, Bobby, Hen and Eddie rush to save hikers endangered by the falling of the Hollywood sign. Meanwhile, Buck and Chimney must rescue a group of pregnant women trapped in a submerged house.

After their recent encounter with "A," Aria, Emily, Hanna and Spencer think they may be closer than ever to figuring out the identity of "A." But when the girls decide to enlist Caleb's (recurring guest star TYLER BLACKBURN) hacking skills to help with their quest, Hanna no longer wants to be a part of the plan. The last thing Hanna wants is to get Caleb involved in something else shady and she also doesn't want to open the door to questions that Hanna can't answer. But once the girls realize that "A" has a helper, Hanna has no other choice. Instead of focusing on figuring out who the "helper" is, though, Hanna decides to put all of her efforts into throwing a surprise party for Caleb. But will a surprise party at Spencer's lake house be the diversion Hanna is looking for, or just a recipe for disaster? Meanwhile, Aria and Ezra must deal with the aftermath of coming clean.

With Lucas missing and questions surrounding what happened out on the lake, Hanna can barely catch her breath. With Caleb determined to find his friend, Hanna’s reluctance to help only causes more problems. Can Hanna really tell Caleb what happened in the boat without tipping him off to her larger “A” problem? And if she did tell him, would he be willing to stick around after hearing all the horrible things Hanna has done? Meanwhile, Spencer follows a lead about “A” which guides her to an unexpected place and revelation.

Caleb's involvement in cracking "A's" phone has had Hanna worried from day one and now "A" is determined to punish him for it. With Det. Wilden and Garrett now circling Caleb on bogus hacking charges and in possession of his computer, Hanna and her friends are convinced that this won't end well. What are the police looking for on Caleb's computer and better yet, would could "A" have possibly planted on the computer to interest the police this much? Aria, Emily, Hanna and Spencer may soon get another example of what happens to people they involve in "A's" game. Meanwhile, Aria learns what Holden's been keeping a secret as Byron starts to question the relationship.

After getting a major clue from Garrett, Hanna and Spencer set out on their separate missions. Hanna sees a perfect opportunity to catch "A" or to at least see who is helping Garrett out. But her perfect plan starts to quickly unravel, leaving Hanna frustrated and desperate. Spencer tries to figure out the meaning of the clue and enlists Jason's help in the search. Meanwhile, Emily gets another flashback from "that night" which leads her to a surprising suspect and Aria starts to question Ezra's sudden influx of cash.