Series episode
| Donnie Wahlberg | ... | Danny Reagan |
| Bridget Moynahan | ... | Erin Reagan-Boyle |
| Will Estes | ... | Jamie Reagan |
| Len Cariou | ... | Henry Reagan |
| Tom Selleck | ... | Frank Reagan |
| Jennifer Esposito | ... | Jackie Curatola |
| Amy Carlson | ... | Linda Reagan |
| Vincent Laresca | ... | Salazar |
| Jim True-Frost | ... | Lyle Greene |
| Corey Parker Robinson | ... | Mark Taylor |
| Stephanie Berry | ... | Mrs. Taylor |
| Sami Gayle | ... | Nicky Reagan-Boyle |
| Amanda Setton | ... | Sylvia |
| Juan Javier Cardenas | ... | Fake Detective |
| Peter Conboy | ... | Police Officer |
| Jeremy Dash | ... | Tattooed Gang Member |
| Miles Grose | ... | Luis |
| Abigail Hawk | ... | Detective Melissa Baker |
| Gina Hernandez | ... | Mayor's Aid |
| Bruno Irizarry | ... | Squad Detective |
| Patrick Oliver Jones | ... | Reporter 2 |
| Rudy Mungaray | ... | Lupino |
| Peter Riga | ... | CSU Tech. |
| Andrew Terraciano | ... | Sean Reagan |
| Tony Terraciano | ... | Jack Reagan |
| Valence Thomas | ... | John |
| Gavin-Keith Umeh | ... | Rocco Jenson |
| James Schram | ... | CSU Technician |
| Alex Zakrzewski | ... | Direction |
| Siobhan Byrne O'Connor | ... | Script |