Danny will be in trouble in the new episode of "Blue Bloods" season 7.

According to reports, someone from the Attorney General's office will seek to put Danny in trouble as the series premieres later in fall.  Also, Frank might be romantically involved with someone while Jamie will work on a murder case involving a drunken celebrity.

In the upcoming season, Danny will face one of the greatest challenges in his life. It can be recalled that in the previous season, he killed the serial killer named Thomas Wilder, who almost killed his niece, Nicky. While his reason for killing was just to defend himself, the event will take its toll on Danny's life in season 7 as Michel Lewis snoops around and looks for evidence that will certainly put him in serious trouble.

In other news, actor Tom Selleck will reprise his role as Police Commissioner Frank Reagan in season 7. In the season 6 finale, he was able to prevent Mayor Poole from leaving his post because he bore the brunt of Officer Haye's death. It can be recalled that just when he was about to announce his resignation publicly on national TV, Frank came to stop him.

Next season, Frank will continue dealing with his family, job and politics. The premiere episode of season 7 will follow him as he gets asked by a widow named Grace to help her stop her son from being part of the police force. Reports also claim that he will have a new love interest after losing his wife in the previous season.

"Blue Bloods" season 7 premieres on September 23 on CBS.