'Castle' photos: Can Beckett protect the man who murdered her mother?

The story of the murder of Kate Beckett's mother is far from over on "Castle." Even though Beckett (Stana Katic) now knows that Senator William H. Bracken (Jack Coleman) is the man behind the conspiracy that led to the murder, she hasn't been able to move forward with the case.

That might change in "Recoil."

Castle (Nathan Fillion) and Beckett cross paths with Bracken again when the murder of a young woman shows evidence that links to the Senator. Becket, of course, wants to bring the man to his much-deserved justice, but further investigation reveals that things are more complicated than they seem.

Naturally, a man like Bracken gets the chance to state his case before being arrested.

But Castle doesn't have to like it.

It's hard to say if Beckett is ready to blame anyone other than Bracken for the murder -- even if there are extenuating circumstances.

And the question remains: How guilty is he?

"Recoil" airs on Monday, Jan. 4 at 10pm on ABC.