Jenna showed up in Rosewood in Episode 4 just after the girls had buried the man formerly known as Dr. Elliott Rollins.
And the Liars weren't too thrilled to see her.
Could her return truly just be a coincidence?
Jenna tried to make amends with her stepbrother Toby, but he was still wary about why she was really back.
It became clear that Jenna had previous connections with Alison's husband.
Just how much did Jenna know?!
Our favorite villain then found that she had the Liars in common with none other than Sara Harvey.
As if Sara and Jenna teaming up wasn't scary enough, Noel also returned to town in Episode 5.
Emily spotted a suspiciously named file on Jenna's laptop when she delivered drinks to her room at The Radley.
Sara tried to warn Emily away but Jenna cut her off before she could fully explain things.
Before Emily had the chance to question her further, Sara Harvey "fell in the shower" and her lifeless body was found by a hotel maid.
Had somebody questioned her loyalty?
Jenna seemed pretty devastated by the whole thing, but were her tears for real?
Meanwhile, Noel was up to no good.
He was determined to get Mary Drake's Radley file... no matter who got hurt along the way!
But he wasn't exactly keeping a low profile!
When the Liars were trapped inside Spencer's car there was one suspect at the top of their list...
After all, this wouldn't be the first time Noel had written this exact message!
Why was somebody so determined to destroy a file all about Noel?
Noel broke all our hearts when he hit Caleb with a car... but thankfully it was all in Hanna's nightmare!
It was still absolutely terrifying!
Back in real life, even Mrs. Grunwald could see how deeply Noel's presence was affecting Hanna.
Was it Noel who tortured Hanna?
Seriously, someone really needed to stop with the Noel information scrub!
How was A.D. always one step ahead?
Hanna decided to take things into her own hands and forced Noel to meet with her.
Meanwhile, after breaking in to the Kahns' cabin, Spencer and Emily discovered that Noel had been helping Charlotte in the Dollhouse all along.
Hanna tried to strike a deal with Noel, but her plan didn't quite work out as she'd expected.
At the DiLaurentis house, Jaria discovered that Stephen Kahn, Noel's dad, was the judge in the adoption of Mary's second child.
Determined to figure out if Noel was related to Mary Drake, Hanna knocked him out and took a sample of his blood to be tested.
Back in Rosewood, Jenna started to get antsy when Noel wasn't picking up his cell.
Ultimate frenemy Mona tried to encourage Jenna to skip town.
However, Jenna didn't seem convinced that Noel would get caught by the cops!
Hanna confessed to the others about kidnapping Noel, but when they went to question him he'd disappeared!
Not onyl was Noel not related to Mary after all, he had also taken Hanna's video camera.
We soon came face to face with Noel again... in literally the scariest building ever!
Was he ever going to let the Liars go free?!
Before Jenna appeared. With a GUN!
The summer finale then provided us with the grossest PLL death yet!
Jenna then shot Spencer - or so we thought until she was driven away by A.D. wearing the signature black hoodie.
Did Jenna really pull the trigger? Is Spencer going to survive? Will the Liars ever find out how Noel was involved in the Dollhouse?!
So many questions!
From the beginning of PLL to now, who do you think has been more dangerous to the Liars: Noel or Jenna?
Let us know your thoughts in the comments.