New "Castle" season 7 spoilers claim that the first episode of the highly anticipated 2-parter special will be off the hook.

As Cartermatt.com reported, "We don't really think that we are blowing you out of the stratosphere when we say that "Reckoning" is going to be one of the biggest episodes of "Castle" season 7. It could end up being one of the biggest of the entire series when it airs on Monday, February 16. This is the end of the two-parter featuring the return of Michael Mosley and Annie Wersching as Jerry Tyson and Dr. Kelly Nieman, and depending on how it ends, it is very well possible that this could mark an end to the 3XK saga."

Fans of the hit ABC series know very well who Jerry Tyson is, and as reports suggested, he could be back this season to continue what he started.

"A serial killer, Tyson first appeared in the Season 3 episode "3XK," and then seemingly bid this mortal coil adieu in Season 5's "Probable Cause," when the psycho plunged off a bridge after Rick shot him several times. The villain's improbable return was hinted at last season, when a pair of eventual murder victims cosmetically altered to look like Espo and Lanie stole all 3XK files from the 12th's records room," TV Line reported.

Previous "Castle" season 7 spoilers have also confirmed the return of Castle and Beckett's nemesis Dr. Kelly Nieman. And with Jerry Tyson by her side, it sure looks like the duo will bring on the evil this season.

Here's a synopsis of "Reckoning" as released by SpoilerTV:

"The 12th precinct tries to stop Dr. Kelly Nieman and Jerry Tyson before they claim another victim."

"Castle" season 7 airs every Monday night on ABC.

Are you excited for the upcoming season 7 episodes? Stay tuned for more spoilers here!