"Blue Bloods" Season 6 will air the episode “Worst Case Scenario” on Friday at 10/9c on the CBS Television Network. It will feature the Reagan clan which includes Frank (Tom Selleck), Danny (Donnie Wahlberg), Erin (Bridget Moynahan), Jamie (Will Estes), Henry (Len Cariou), Linda (Amy Carlson), Nicky (Sami Gayle), Jack (Tony Terraciano) and Sean (Andrew Terraciano). This episode is about an act of terrorism that threatens the Reagans’ beloved New York City.

After the show's Season 5 finale titled “The Art of War” and its penultimate episode “New Rules,” which showed a shooter in NYC and a Reagan who suffered from a gunshot wound, the Reagans get back to business. But this time, they face a larger threat in the form of international terrorism.

Spoiler Alert! This article contains "Blue Bloods" Season 6 premiere spoilers.

TV Guide reports that in “Worst Case Scenario,” there will be a terrorist attack in the Middle East. Unfortunately, the next target appears to be New York City. This puts Frank into high alert mode as he anticipates and tries to prevent the attack from reaching the U.S.

The Season 6 premiere episode of “Blue Bloods” is directed by Alex Chapple and written by Bryan Goluboff. Guest stars of this episode include Timothy Adams (John Knight, ESU Captain), Yair Ben-Dor (Naseem Akhtar), Ramin Karimloo (Barry Hamidi), Curtis Lyons, Jr. (Raid Team Member), Meredith Jackson (Event Manager), Mark Badaczewski (Stas), Imran W. Sheikh (Manny the Vendor) and Cliff Samara (Manny's Father).

Jackie Debatin (Mickey, Club Owner), Kario Pereira-Bailey (Samir Fayad), Jared Morrison (Detective), Andrew Pang (Doctor), Annie Meisels (Nurse 3), Louis Sallan (Traffic Cop), Canedy Knowles (Nurse 2) and Brandhyze Stanley (Grace Michaels) will also be among the guest stars in “Worst Case Scenario.”

The Internet Movie Database (IMDb) listed other actors and actresses who will be seen in this episode, such as Lois King (Keleigh Brockman), Steve Mason (Serial Killer Double), Meghann Fahy (Lacey Chambers), Lindsay Mushett (Ashley Juliano), Taylor Rose (Danielle), Dominik Tiefenthaler (Nicholas Costa), Ari Werlein (lieutenant -District 65 - uncredited), Samantha Lee Johnson (Jogger - uncredited) and Marmee Cosico (Tucker Personnel - uncredited).

Aside from the main cast and the guest stars, the other cast members of the show such as Marisa Ramirez (Det. Maria Baez), Vanessa Ray (Officer Eddie Janko), Gregory Jbara (DCPI Garrett Moore), Abigail Hawk (Abigail Baker) and Robert Clohessy (Lt. Gormley) will also appear in this episode. Click here to watch preview videos of “Worst Case Scenario” from the show’s official YouTube channel.

"Blue Bloods" airs Fridays at 10 pm on CBS. The next Season 6 episode is “Absolute Power,” which will air on Oct. 2.

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