Series episode
| Donnie Wahlberg | ... | Danny Reagan |
| Bridget Moynahan | ... | Erin Reagan-Boyle |
| Will Estes | ... | Jamie Reagan |
| Len Cariou | ... | Henry Reagan |
| Tom Selleck | ... | Frank Reagan |
| Amy Carlson | ... | Linda Reagan |
| Nicholas Turturro | ... | Sgt. Anthony Renzulli |
| Robert Clohessy | ... | Sgt. Gormley |
| Sanjit De Silva | ... | Sammy Khan |
| Matt Servitto | ... | Soren |
| Sami Gayle | ... | Nicky Reagan-Boyle |
| Ramsey Faragallah | ... | Imam |
| Debargo Sanyal | ... | Malik |
| Jennifer Esposito | ... | Jackie Curatola |
| Tony Terraciano | ... | Jack Reagan |
| Andrew Terraciano | ... | Sean Reagan |
| Abigail Hawk | ... | Detective Melissa Baker |
| Ami Sheth | ... | Farrah |
| Lohrasp Kansara | ... | Raheem |
| Kelvin Hale | ... | Detective Hawks |
| Scott Winters | ... | Doctor |
| Tim Wright | ... | Coach |
| Maya Dajón | ... | Witness |
| Kareem Hamdy | ... | El Haq's associate |
| Fady Kerko | ... | El Haq's associate |
| Heather Lind | ... | Melissa Samuels |
| Jimmy Palumbo | ... | Chief Winston |
| Larisa Polonsky | ... | Chelsea |
| Karen Shallo | ... | Mrs. Meyers |
| Faran Tahir | ... | El Haq |
| Michael T. Weiss | ... | Sonny Malevsky |
| Mike Catapano | ... | Partying Detective |
| Moe Hindi | ... | Cricket Player |
| Nishi Rajan | ... | Muslim Woman |
| Derrick Simmons | ... | Security Guard |
| Frederick King Keller | ... | Direction |
| Thomas Kelly | ... | Script |