• Joey McIntyre and Donnie Wahlberg of New Kids on the Block perform during the first show of the group's four-night run at The Axis at Planet Hollywood Resort & Casino on July 10, 2014 in Las Vegas, Nevada.

Joey McIntyre and Donnie Wahlberg of New Kids on the Block perform during the first show of the group's four-night run at The Axis at Planet Hollywood Resort & Casino on July 10, 2014 in Las Vegas, Nevada. (Photo : Getty Images/Ethan Miller)

One thing that viewers will find out in "Blue Bloods" Season 7 episode titled "Good Cop, Bad Cop" is whether or not Frank Reagan (Tom Selleck) will reinstate a disrespectful cop named Richard Clark (Daniel Abeles). The episode will air on CBS on Sept. 30.

Richard violated some common rules and Frank believes that with the unfavorable public perception nowadays, police officials have to be held to high standards. Frank's department ridicules him with the way he handles the situation as some argue that the punishment is so severe that it has forced Richard to seek a transfer.

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In "Good Cop, Bad Cop," Danny Reagan (Donnie Wahlberg) and Det. Maria Baez (Marisa Ramirez) will investigate the death of an elderly woman. She was killed by a stray bullet while in her home.

Erin Reagan (Bridget Moynahan) will step in to help her detective. Also, Anthony Abetemarco (Steve Schirripa) will find a legal solution to a case that is personal to him.

"Good Cop, Bad Cop" is written by Brian Burns and directed by Kellie Cyrus. Regular cast members Will Estes, Len Cariou, Amy Carlson, Sami Gayle, Tony Terraciano and Andrew Terraciano will also appear in the episode. Their respective roles are Jamie Reagan, Henry Reagan, Linda Reagan, Nicky Reagan-Boyle, Jack Reagan and Sean Reagan.

Recurring cast members Abigail Hawk, Gregory Jbara, Robert Clohessy and James Nuciforo will appear in "Good Cop, Bad Cop." They play Abigail Baker, DCPI Garrett Moore, Lt. Gormley and Nuciforo, respectively.

Several guest cast members will be featured in "Good Cop, Bad Cop," as well. Among them are Suzanne Shepherd as Lucille Abetemarco, Malachi Omega as Terrell Spaulding, Sean Crespo as Larry Hale, Joseph Parks as Frankie Reed, Felicia Pearson as Roxy Barnes and Michael Barra as Dominick Barbosa.

Watch an interview with Wahlberg here: