'Castle' Spoilers Season 7: Significant Shift In Castle's Life, Stana Katic Says To 'Change Shape Of Show', Watch Naughty Boy Castle At Strip Club [VIDEO]

"Bad Santa," which is the winter season-finale of "Castle" Season 7, will see Rick Castle and Kate Beckett investigating the murder of an ER doctor by a man wearing a Santa suit. The victim Vic turns out to be a mob doctor. This episode is set to end on an interesting note, which is going to shake things up. As a result of this, there is going to be a 'significant' shift in Castle's life.

Speaking about episode 10, David Amann, showrunner of "Castle," has said to TV Guide, "We're looking at a bit of a game-changer for Castle at the end of the episode." He ruled out the possibility of Castle and Beckett separating but said that the "events of the episode will cause a shift...in Castle's life in a fairly significant way."

Stana Katic, who plays Beckett, has also confirmed that "Bad Santa" is going to end on a cliffhanger. In an interview with TV Line, she said that the winter-season finale episode is "going to change the shape of the show for a few episodes ..."

As previously reported, Castle will be considered an "honorary mobster" after he finds himself in the middle of a potential mob-war. In the sneak peek released of the episode, Castle and Beckett are seen at a strip club. They are visiting the club to meet Castle's mobster-friend Dino to seek his help in the murder investigation. He used to be "Derrick Storm" consultant. However, it looks like, seeing the exotic dance moves of the girls, Castle seems to have forgotten all about the purpose of his visit and also that he is a married man. It is Beckett who stops him from staring at the girls.

"Castle, you keep staring like that, you need to pay for the two drinks minimum," Beckett can be seen saying. Also in the sneak peek, Castle can be seen introducing Beckett to Dino who the former believes is a nice guy despite being a mobster. Dino informs Castle that he has finished reading his latest book "Raging Heat" and adds that it is a "terrific, wonderful story." The mob-boss takes a step back when Beckett shows her badge, saying that she is homicide detective.

In addition to Castle's naughty antics and mob-fight, Lanie and Esposito taking a big step in their relationship is going to be another highlight of "Bad Santa."

[Youtube/Becklebee CastleVitalScenes S7]