With ABC's hit crime series Castle currently on a hiatus until 2014 for season 6, many fans are surely racking their brains as to what will transpire in its second half.

According to Carter Matt on Nov. 28, the issue of Pi needs to be resolved. The site reported that he should either be kept around and made less annoying or be given the old heave-ho. Being that Castle (Nathan Fillion) has given him a chance, the former will likely happen, at least early on.

WIth The Triple Killer (3XK) still at large, loyalists of the show are likely very curious as to when the respective storyline will be resolved, as the scene about Dr. Kelly Niemanand is the only piece of related info that has been most sufficient to audiences regarding the killer.

Interesting enough, fans can rest assure that Castle's father, played by James Brolin, will be coming back at some point in the remainder of the sixth installment.

ABC's Castle will be airing its next episode on Monday, Jan. 6 at 10 p.m. EDT. Be sure to keep checking back for more of the latest details on the popular TV series. The above-mentioned promo video can be viewed below.

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Castle, ABC, Television