ABC's Castle continues to garner increasing anticipation over its upcoming sixth installment.

While most of the chatter as of late on the crime TV series has been primarily about Castle (Nathan Fillion) and Beckett's (Stana Katic) marriage proposal out, it was recently revealed that there will be a brand new character gracing the small screen.

According to SpoilerTV, one of the newbie roles is being referenced as PI, a male described as a free spirit who chances are, is a private investigator.

To top off the speculation, PI is rumored to be having some sort of relationship with Castle's daughter Alexis (Molly Quinn).

In the recent past, the crime novelist has had qualms about letting his daughter venture too far due to the kidnapping that transpired during the May sweeps.

The respective predicament may serve as a clear-cut indicator that Castle won't be so keen on letting Alexis get cozy with a guy who could possibly put her in harm's way due the nature of his job.

Although no airdate has yet to be made official, all indications point to the show starting up again on either Monday, September 23 or the following week, stated the website. Be sure to keep checking back for more of the latest details on the popular ABC series.

A fan-made trailer portraying the upcoming season can be watched below.

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Castle, Television, ABC