"The Blacklist" Season 4 will premiere in just a few more weeks and is poised to answer some of the NBC series' biggest mysteries.

In "The Blacklist" Season 3, Elizabeth "Liz" Keen (Megan Boone) faked her own death with the help of Mr. Kaplan (Susan Blommaert) in order to get her daughter Agnes away from Red (James Spader). She and her husband Tom (Ryan Eggold) planned to escape to Cuba with their newborn daughter, but their plans were thwarted when Alexander Kirk (Ulrich Thomsen) kidnapped Liz. And as if things weren't complicated enough, Kirk then revealed that he is Liz's biological father.

In the new "Blacklist" Season 4 sneak peek released by Entertainment Weekly, it looks like Kirk's revelation won't exactly result to a happy family reunion. Red will find out where Kirk is keeping Liz captive and will go to save her with guns ablazing. Even though Liz tried to get away from Red last season, she doesn't hesitate to accept his help when he comes to rescue her. When he finds them, she and Kirk are on the other side of a one-way mirror, making it difficult for Red to know where exactly to point his gun and shoot. She helps him out by telling Red he's on his left, which then prompts him to empty his gun in Kirk's direction.

"It's time to uncover Liz's twisted past," the trailer teases, hinting that the next season of the NBC series will reveal more of her backstory and perhaps explain why Kirk decided to find Liz and introduce himself as her father.

But for those who are still in doubt of Kirk being Liz's biological father, executive producers Jon Bokenkamp and John Eisendrath previously said that there's no reason to doubt Kirk is telling the truth about being her real dad. "I don’t know why we wouldn’t believe him. Red’s said before that he’s not Liz’s father. This man shows up in her life and says he’s her father. Liz should take him at his word. She thought she shot her father. It raises a number of questions, which is going to be the joy of season 4," Bokenkamp told Entertainment Weekly.

"We cannot unpack a story point like she thinks she shot her father and then introduce a new element that completely negates it, because that would damage our relationship with the audience and their trust in the story that we’re telling. All of the things that you would point to and add up on one side of the ledger that might discount this guy’s story about his being her father, we are responsible for next year and in years to come to incorporate it into the story that we’ve already told," Eisendrath added.

As for Liz's other biological parent, her mother (Lotte Verbeek) has been confirmed to make an appearance in at least two episodes in Season 4, but whether she'll appear in the form of flashbacks or actually re-enter Liz's life remains to be seen. 

Meanwhile, though the new "The Blacklist" teaser showed that Red and Liz will reunite and work together again, the fact that she faked her own death will still hang heavily over them next season. 

"Here’s what I love about this arc and her death — our fans, the really die hard fans, they were pissed when Liz died! They’re smart enough to know that Red and Liz are the show. The questions of who Red is to her, why he cares so deeply for her, what he wants from her — that’s all that ultimately really matters, and when we took Liz away from them the fans were rightfully upset. Hopefully, they see we’re not going to abandon that relationship, no matter how strained it becomes. And believe me — it will be strained. But that relationship is everything," he told Deadline.

Watch the new "The Blacklist" Season 4 teaser here and tell us what you're expecting to see in the upcoming season of the NBC series in the comments below! Catch Red and Liz in action when "The Blacklist" Season 4 premieres Thursday, Sept. 22 at 10 p.m. ET. on NBC.

The Blacklist Elizabeth Keen (Megan Boone) will reunite with Red (James Spader) in "The Blacklist" season 4. Photo: NBC/The Blacklist