WARNING: This article contains spoilers for Blue Bloods season 10 episode 6. Read at your own risk.

Blue Bloods season 10 episode 6 is set to arrive later this week, and there are a lot of problems waiting for the characters -- particularly to Danny and Frank. Titled "Glass House," the latest episode will see Danny searching for the mysterious pen-pal killer, while Franks needs to deal with the issue regarding police pensions.

In Blue Bloods season 10 episode 6, Danny will hunt down a killer who shot his online prison pen-pal. However, he found out that the victim is connected to different people in prison. Soon, they learned that the victim actually interested in incarcerated people and she even had a romantic bond with one of her legal clients.

Is it possible that this person killed the victim -- or could it be someone she corresponded with? It seems like there are a lot of candidates as to who killed her, especially since many people may hold a grudge against her. One of them probably felt attached to the victim and felt she would be there for him, but that didn't happen.

In another part of Blue Bloods season 10 episode 6, Frank is facing another issue as he had to deal with former cop Rick Austin's gripe about his pension. This issue is, perhaps, close and dear to the hearts of most people since it's about police pensions. As per CarterMatt, this episode allows Blue Bloods to explore something relatable for the majority of the viewers.

Blue Bloods season 10 episode 6 will also see Jamie helping a friend, Connor O'Brien, who's dealing with the illicit pictures of his daughter on the internet. Anthony, on the other hand, will realize that his son, Sam, might not be really suited for the police work.

In a related report, Nicky might be gone for the time being, but there's still a chance she'll return as CarterMatt noted the character's departure hasn't been confirmed by either Sami Gayle or the series. In the recent episode, Nicky revealed she'll be leaving New York for San Francisco.

The actress has been in the series for a long time. While she hasn't had any great stories unlike other characters, she's still an important part of the Reagan family. Right now, however, Gayle has yet to confirm her future in the series.

Blue Bloods season 10 episode 6 will air on Friday, Nov. 1, on CBS.