(Warning: This post contains spoilers through the Season 5 finale of “The Blacklist.”)

Raymond Reddington is a liar, and Elizabeth Keen is going to prove it. In this new sneak peek from the two-part Season 6 premiere of “The Blacklist,” which is exclusive to TheWrap, Lizzie hits the ground running on that assignment.

In the 54-second clip, Liz (Megan Boone) and her sister Jennifer Reddington (guest star Fiona Dourif) are discussing their plans to secretly investigate the identity of the imposter (James Spader) who has been posing as their father, Raymond Reddington, for the last 30 years. (Right? That shock came at the end of Season 5.)

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Jennifer wants to go to FBI, but Liz says that’s just not an option, given Red’s status. No, they need to wait to see if they can restore the medical files that Reddington erased when they are suddenly interrupted — by Red.

Yes, it’s safe to say Liz and Red are going to have a very “complicated” dynamic during the upcoming season of the NBC drama.

Here’s the official description for the season: Following the startling revelation that Raymond “Red” Reddington (James Spader) isn’t who he says he is, Elizabeth Keen (Megan Boone) is torn between the relationship she’s developed with the man assumed to be her father and her desire to get to the bottom of years of secrets and lies. Red leads Liz and the FBI to some of the most strange and dangerous criminals yet, growing his empire and eliminating rivals in the process. All throughout, Liz and Red engage in an uneasy cat-and-mouse game in which lines will be crossed and the truth will be revealed.

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“The Blacklist” also stars Diego Klattenhoff, Amir Arison, Mozhan Marnò, Hisham Tawfiq and Harry Lennix.

John Eisendrath, Jon Bokenkamp, John Davis, John Fox, James Spader, Lukas Reiter, J.R. Orci, Carla Kettner and Laura A. Benson serve as executive producers.

Watch the video above.

“The Blacklist” two-night, two-part premiere begins Jan. 3 at 10/9c and continues Jan. 4 9/8c on NBC.