 | Mark Wahlberg | .... | Tommy Saunders |
 | Dicky Eklund Jr. | .... | Young Police Officers |
 | Michael Marchand | .... | Young Police Officers |
 | Rhet Kidd | .... | Harrold |
 | John Goodman | .... | Commissioner Ed Davis |
 | Frank Czarnowski | .... | Officer Outside Harrold?s Apartment |
 | Christopher O'Shea | .... | Patrick Downes |
 | Rachel Brosnahan | .... | Jessica Kensky |
 | Jake Picking | .... | Officer Sean Collier |
 | Lana Condor | .... | Li |
 | Jerry Dwyer Jr. | .... | MIT Grad Students |
 | Patrick Wensing | .... | MIT Grad Students |
 | Michael Chuah | .... | MIT Grad Students |
 | Sangbae Kim | .... | MIT Professor |
 | Michelle Monaghan | .... | Carol Saunders |
 | Jimmy O. Yang | .... | Dun Meng |
 | Pin Pin Yang | .... | Meng's Mom |
 | Wingkay Leung | .... | Meng's Dad |
 | Caitlin Stoorza | .... | Tamerlan's Daughter |
 | Kendall Stoorza | .... | Tamerlan's Daughter |
 | Melissa Benoist | .... | Katherine Russell |
 | Alex Wolff | .... | Dzhokhar Tsarnaev |
 | Themo Melikidze | .... | Tamerlan Tsarnaev |
 | J. K. Simmons | .... | Sergeant Jeffrey Pugliese |
 | Martine Assaf | .... | Connie Pugliese |
 | Pamela Amicy | .... | Tiesha |
 | James Colby | .... | Superintendent Billy Evans |
 | Michael Beach | .... | Governor Deval Patrick |
 | Brandon Wahlberg | .... | Officer Travis Dixon |
 | Kelby Turner Akin | .... | Officer Dic Donohue |
 | Billy Smith | .... | Charlie Collins |
 | Paige MacLean | .... | Lisa Murphy |
 | Freddie Wong | .... | Chinese Restaurant Manager |
 | Cara O'Connell | .... | Kara |
 | Dustin Tucker | .... | Steve Woolfenden |
 | Lucas Thor Kelley | .... | Leo Woolfenden |
 | Adele B. Garde | .... | Spectator at Finish Line |
 | Evan Bernard | .... | Yankees Fan |
 | Toby Dearing | .... | Q (Davis Driver) |
 | Daniel Martin | .... | Marathon Sports Manager |
 | Steven Mulcahy Jr. | .... | Boston Police Officer with Leo |
 | Tereza Kacerova | .... | Woman at Second Bomb Scene |
 | Kevin Bacon | .... | Special Agent Richard DesLauriers |
 | Adam Trese | .... | John Bradshaw |
 | Hampton Fluker | .... | James Williams |
 | Kathy-Ann Hart | .... | Secretary |
 | James Dumont | .... | MEMA Director |
 | Josh Brogadir | .... | Falcon Reporter |
 | Jeffrey J. Pugliese Jr. | .... | Falcon Analysts |
 | Brandon Scales | .... | Falcon Analysts |
 | Anthony C. Smith | .... | Falcon Analysts |
 | Dr. Youssra Marjoua | .... | Jessica's Surgeons |
 | Dr. Allan Hamilton | .... | Jessica's Surgeons |
 | Dr. Kimberley Lloyd O'Sullivan | .... | Patrick's Surgical Nurse |
 | Billy Donahue | .... | Honor Guard Trooper |
 | Kathy Harum | .... | Carol's Mom |
 | Jay Giannone | .... | Jimmy |
 | Steven Ranelli | .... | Heavy Cousin |
 | Arthur S. Wahlberg | .... | Uncle Archie |
 | Ronnie White Jr. | .... | Young Officer at Falcon |
 | John Enos III | .... | Older Officer at Falcon |
 | Anthony Thomas | .... | Third Officer at Falcon |
 | Charles Luise | .... | Massachusetts State Police Colonel |
 | Jenifer Cosgrove | .... | Tylenol Nurse |
 | John Bolger | .... | Jessica's Father |
 | Janine Robinson | .... | Administrative Nurse |
 | Chase Campbell | .... | Vitals Nurse |
 | Cliff Moylan | .... | Sergeant John MacLellan |
 | Erica McDermott | .... | Jimmy's Girlfriend |
 | Nathan Philip Johnson | .... | Falcon Analyst |
 | Max McGillivray | .... | Crate and Barrel Analyst |
 | Caralyn Aufiero | .... | Back Bay Social Club Analyst |
 | Jeffrey Thompson | .... | Whiskey Steakhouse Analyst |
 | Alex Grossman | .... | Li's Friend |
 | Curtis J. Bellafiore | .... | Officer Joey Reynolds |
 | Elijah Guo | .... | Dias Kadyrbayev |
 | Token | .... | Dzkhokar's Roommate |
 | Jin Yang Brancalhao | .... | Aza |
 | Brent Saunders | .... | Robel |
 | Dun Meng | .... | Pizza Patron |
 | Peter Berg | .... | Guy Opening MIT Door |
 | Jonathan Angel | .... | Young Men Walking in Watertown |
 | Phil Thomas | .... | Young Men Walking in Watertown |
 | Hillel Shamam | .... | Shell Station Clerk |
 | Keith Fluker | .... | Officer at Shell Station |
 | Eladio Sanchez | .... | Second Officer at Shell Station |
 | Ken Casey | .... | Man on Porch |
 | Matt Kutcher Jr. | .... | Watertown Police Officers |
 | Kevin R. Molis | .... | Watertown Police Officers |
 | Bill Bloodgood | .... | Watertown Police Officers |
 | Brian Gehl | .... | Watertown Police Officers |
 | Lee Reams | .... | Watertown Police Officers |
 | Dr. Edward Laws | .... | Tamerlan's Surgeons |
 | Linda Klein | .... | Tamerlan's Surgeons |
 | Dean Neistat | .... | Michael Butler |
 | Cedric Gervais | .... | Officer at Door |
 | David Henneberry | .... | Guy on Porch |
 | Albert M. Chan | .... | Computer Forensic Tech |
 | Bria D'Aguanno | .... | College Students in Robes |
 | Kallie Tabor | .... | College Students in Robes |
 | Christopher Whitcomb | .... | The Virginian |
 | Mark Semos | .... | FBI Hostage Rescue Team |
 | Mark Schotz | .... | FBI Hostage Rescue Team |
 | James Davis | .... | Young Officer at Arsenal |
 | John Fiore | .... | Michael Thomas |
 | Khandi Alexander | .... | Interrogator |
 | Marvin Williams | .... | Man in Interrogation Room |
 | Rick Burtt | .... | Boat Owner |
 | Donna MacClary | .... | Boat Owner's Wife |
 | Anastasia Barnes | .... | Watertown Officer |
 | Sean Avery | .... | Watertown Officer Franklin Street |
 | Sam Castriotta | .... | Officer on Roof |
 | Joel Lambert | .... | Sniper |
 | Michael Dowling | .... | Sniper |
 | David Ortiz | .... | David Ortiz |
 | Marco Aguirre | .... | MIT Student (uncredited) |
 | Giovanni Alabiso | .... | Marathon Sports Employee (uncredited) |
 | Charlie Alejandro | .... | Female Boston Police (uncredited) |
 | Charlie Alejandro | .... | SWAT Officer (uncredited) |
 | Mel Alejandro | .... | Boston Police (uncredited) |
 | Mel Alejandro | .... | SWAT Officer (uncredited) |
 | Colin Allen | .... | Technician #7 (uncredited) |
 | James Alonardo | .... | Police Officer (uncredited) |
 | Janice Amaya | .... | Technician (uncredited) |
 | Anthony Andruss | .... | Marathon Spectator (uncredited) |
 | Fatima Armaghan | .... | Injured Victim (uncredited) |
 | Lilith Astaroth | .... | Boston Marathon Spectator (uncredited) |
 | Ralph Ayala | .... | FBI Agent (uncredited) |
 | Sophia Bakas | .... | Marathon Onlooker (uncredited) |
 | Sophia Bakas | .... | Blast Victim (uncredited) |
 | Scott Bannister | .... | Camera Man (uncredited) |
 | Sophia Bellas | .... | Onlooker (uncredited) |
 | Nicole Nikki Belli | .... | Patron (uncredited) |
 | Steve Bertorelli | .... | Bar Patron (uncredited) |
 | Nicole Bohane | .... | FBI Analyst (uncredited) |
 | David S. Bookbinder | .... | Marathon Spectator (uncredited) |
 | David Boston | .... | Politician (uncredited) |
 | Macayla Botelho | .... | Marathon Sports Employee (uncredited) |
 | Mike Bouley | .... | Cop #1 (uncredited) |
 | Londi Brooks | .... | Hospital Victim (uncredited) |
 | Margaret Buff | .... | Jessica's mom (uncredited) |
 | Mark Burzenski | .... | Marathon Victim (uncredited) |
 | Joe Cali | .... | FBI Haz Mat Agent (uncredited) |
 | Jesse Christensen | .... | Boston Marathon Runner (uncredited) |
 | Angel Connell | .... | Politician (uncredited) |
 | Jeffrey Corazzini | .... | Marathon Volunteer (uncredited) |
 | Stevie Costa | .... | Police Officer (uncredited) |
 | Douglas Cowell | .... | Finish Line Volunteer (uncredited) |
 | Benjamin Crocker | .... | Hostage Resuce Team (uncredited) |
 | Vincent Curatola | .... | Mayor Thomas Menino (uncredited) |
 | Kevin Daigneault | .... | National Guard (uncredited) |
 | David De Beck | .... | Chief Deveau (uncredited) |
 | Kevin DeCoste | .... | Marathon Victim (uncredited) |
 | Hosea DeMarzino | .... | Off Duty Officer (uncredited) |
 | Nicholas Deveau | .... | Marathon Runner (uncredited) |
 | Roger Dillingham Jr. | .... | Watertown FireFighter (uncredited) |
 | Rob DiNinni | .... | Medical First Responder (uncredited) |
 | Brian Dongelewic | .... | Marathon Runner (uncredited) |
 | Sunny Duane | .... | Townie (uncredited) |
 | Sunny Duane | .... | Driver (uncredited) |
 | Tim Dwyer | .... | State Trooper (uncredited) |
 | Ellyana | .... | Watertown Resident (uncredited) |
 | Matthew Engellenner | .... | BAA Volunteer (uncredited) |
 | Matthew Engellenner | .... | Finish Line Hero (uncredited) |
 | Tim Estiloz | .... | FBI Analyst (uncredited) |
 | Larry Eudene | .... | Marathon Sports Victim (uncredited) |
 | Steven Fallas | .... | MIT Student (uncredited) |
 | Mark Falvo | .... | Bystander (uncredited) |
 | Tayla Fernandez | .... | Girl Outside Sean Colliers (uncredited) |
 | Mugisha Feruzi | .... | FBI Agent (uncredited) |
 | Pamela Figueiredo | .... | FBI Agent (uncredited) |
 | Olivia Filleti | .... | Boston EMS (uncredited) |
 | John Franchi | .... | Park Pedestrian (uncredited) |
 | James Gaiero | .... | Bartender (uncredited) |
 | Anthony Romeo Garcia | .... | Bomb Suspect (uncredited) |
 | Alex Gettlin | .... | BAA Volunteer (uncredited) |
 | Alex Gettlin | .... | Finish Line Hero (uncredited) |
 | Munjeet Geyer | .... | FBI Agent (uncredited) |
 | Mickey Gilmore | .... | BPD Bombing (uncredited) |
 | Kyle Goebel | .... | Boston Police Officer (uncredited) |
 | Ed Goode | .... | Cameraman (uncredited) |
 | Jared M. Gordon | .... | Dock Worker (uncredited) |
 | Maria Green | .... | Bystander (uncredited) |
 | Jed Griswold | .... | Citizen (uncredited) |
 | Mark Haggett | .... | Park Jogger (uncredited) |
 | Alin Halajian | .... | FBI Agent (uncredited) |
 | London Hall | .... | FBI Agent (uncredited) |
 | Katie Hanley | .... | Pat and Jessica's Friend (uncredited) |
 | Gary A. Hecker | .... | Special Voices (uncredited) |
 | Audrey Hendricks | .... | Victim (uncredited) |
 | Johnny L. Hernandez | .... | Environmental Police ( Fish & Game) (uncredited) |
 | Arthur Hiou | .... | FBI Analyst (uncredited) |
 | Kimberly Howe | .... | Injured Victim (uncredited) |
 | Katrine Hoyt | .... | Surgical Nurse #2 (uncredited) |
 | Ian Dylan Hunt | .... | HIG Interrogator (uncredited) |
 | Frankie Imbergamo | .... | Doctor (uncredited) |
 | Stacey Forbes Iwanicki | .... | Marathon Runner (uncredited) |
 | Jahmilla Jackson | .... | Victim (uncredited) |
 | Nicole Jesson | .... | FBI Computer Analysis Response Team (uncredited) |
 | Stephen Stix Josey | .... | FBI Agent (uncredited) |
 | Colleen Kelly | .... | FBI Analyst #4 (uncredited) |
 | Malcolm Kelner | .... | Watertown Police Officer (uncredited) |
 | Bettina Kenney | .... | Anchorwoman (uncredited, voice) |
 | Jeffery Kincannon | .... | Boston Police Department Officer (uncredited) |
 | David Lacreta | .... | Victim (uncredited) |
 | David Langill | .... | Boston Police Officer (uncredited) |
 | Lauren Laperriere | .... | MIT Student (uncredited) |
 | Renee Lawrie | .... | Forensic FBI Agent (uncredited) |
 | James L. Leite | .... | Felix G Arroyo (uncredited) |
 | Sigrid Lium | .... | Bartender (uncredited) |
 | Adam Lonergan | .... | Boston SWAT (uncredited) |
 | Patrick Lospennato | .... | Boston Police Officer (uncredited) |
 | Sal Lucio | .... | Boston SWAT Team Leader (uncredited) |
 | Kristi Lynn | .... | Boston Police Woman (uncredited) |
 | Rob Lévesque | .... | Red Sox Fan at Tribute (uncredited) |
 | Jeff MacKinnon | .... | BPD Officer Sommers (uncredited) |
 | Jimmy Malcolm | .... | Marathon Spectator (uncredited) |
 | Wayne Malm Jr. | .... | Bar Patron (uncredited) |
 | Lawrence Marino | .... | Boston Police SWAT Officer (uncredited) |
 | Robert Marsella | .... | Boston Cop #1 (uncredited) |
 | Robert Marsella | .... | SWAT (uncredited) |
 | Daniel Martignetti | .... | Volunteer (uncredited) |
 | Acei Martin | .... | FBI Analyst (uncredited) |
 | Adam Masnyk | .... | Lab Technician #3 (uncredited) |
 | Joeseph Massa | .... | Runner (uncredited) |
 | Mathuin | .... | Politician (uncredited) |
 | Mathuin | .... | FBI Analyst (uncredited) |
 | Jamie Mazareas | .... | FBI Analyst (uncredited) |
 | Daniel McGraw | .... | Boston Marathon Patron (uncredited) |
 | Stephanie McIntyre | .... | Runner (uncredited) |
 | Clara McKay | .... | Injured Victim (uncredited) |
 | Monique McKellop | .... | Marathon Runner (uncredited) |
 | Wayne R. Miller | .... | Finish Line Medical Volunteer (uncredited) |
 | Matt Mings | .... | Boston Cop (uncredited) |
 | Anthony Molinari | .... | Waterville Policeman (uncredited) |
 | Adrian M. Mompoint | .... | Red Sox Player (uncredited) |
 | Gavin Monteiro | .... | Ecuadorian Family Member (uncredited) |
 | Noelle Therese Mulligan | .... | Runner Fiance (uncredited) |
 | Johnny O'Halloran | .... | Marathon Spectator (uncredited) |
 | Barack Obama | .... | Himself(archive footage) (uncredited) |
 | Donna Ognibene | .... | Boston Marathon Runner (uncredited) |
 | Chuey Okoye | .... | MIT Student (uncredited) |
 | Robert Oliva | .... | Marathon Onlooker (uncredited) |
 | Robert Oliva | .... | Blast Victim (uncredited) |
 | Richard Pacheco | .... | Staff Official (uncredited) |
 | Arissa Page | .... | Victim (uncredited) |
 | Joseph Paolo | .... | State SWAT (uncredited) |
 | Anthony Pelton | .... | Boston Police (uncredited) |
 | Anthony Pelton | .... | SWAT Officer (uncredited) |
 | Katie Petkiewich | .... | Crowd Spectator (uncredited) |
 | Emily Petta | .... | Dr. #2 (uncredited) |
 | Allen Phillips | .... | Boston Police Officer (uncredited) |
 | Thomas Pimentel | .... | Boston Police Officer (uncredited) |
 | Emelie Pla | .... | Marathon Victim (uncredited) |
 | Rickland Powell | .... | Pedestrian (uncredited) |
 | Leah Procito | .... | Nurse (uncredited) |
 | Lorna Pruce | .... | Mass State Trooper (uncredited) |
 | Marinko Radakovic | .... | Police Officer (uncredited) |
 | Anne Reardon | .... | Krystle Campbell (uncredited) |
 | Michelle Romano | .... | Reporter (uncredited) |
 | Diana Rombola | .... | Marathon Runner (uncredited) |
 | Lexie Roth | .... | FBI Agent (uncredited) |
 | Melanie Blake Roth | .... | Hospital Victim #4 (uncredited) |
 | Harold Rudolph | .... | Boston Police Officer (uncredited) |
 | Christian Ruiz | .... | Marathon Runner Victim (uncredited) |
 | Anastasia Mousis Sanidopoulos | .... | FBI Analyst (uncredited) |
 | John Sarnie | .... | Victim at Hospital #5 (uncredited) |
 | Gregory Schwabe | .... | Negotiator 1 (uncredited) |
 | Cory Scott | .... | Harvard Professor (uncredited) |
 | Cory Scott | .... | FBI Lecturer (uncredited) |
 | Billy Silvia | .... | Governor Patrick's Security (uncredited) |
 | Alexandra Smith | .... | Marathon Volunteer (uncredited) |
 | Alexandra Smith | .... | Spectator (uncredited) |
 | Joe Sobalo, jr. | .... | Cambridge Cop (uncredited) |
 | Michael Southworth | .... | MIT Student (uncredited) |
 | Sydney St. Claire | .... | Marathon Spectator (uncredited) |
 | P. J. Stack | .... | National Guard (uncredited) |
 | David Struffolino | .... | Diner (uncredited) |
 | Michael Steven Swanson | .... | FBI Analyst (uncredited) |
 | Adam Teper | .... | Boston Police Officer (uncredited) |
 | Jared Tivnan | .... | Massport Police Officer (uncredited) |
 | David Lee Valle | .... | BPD Police (uncredited) |
 | David Lee Valle | .... | SWAT (uncredited) |
 | Rob Vardaro | .... | FBI Agent (uncredited) |
 | George J. Vezina | .... | FBI Analyst (uncredited) |
 | Kevin Vila | .... | Watertown Police Officer (uncredited) |
 | Nicolas Villamizar | .... | Ecuadorian Father (uncredited) |
 | Ellen Ward | .... | Marathon Victim (uncredited) |
 | Christol Ware | .... | Triage Victim #1 (uncredited) |
 | Mike Wendt | .... | Bar Patron (uncredited) |
 | Dan Whelton | .... | Jeff Bauman (uncredited) |
 | Jamie Christopher White | .... | Marathon Victim (uncredited) |
 | Richard Wingert | .... | State Police Officer Williams (uncredited) |
 | Dora Winifred | .... | Runner (uncredited) |
 | Darryl Wooten | .... | Murder Cop #3 (uncredited) |
 | Abigail Wurster | .... | MIT Student (uncredited) |
 | LowRes Wünderbred | .... | Marathon Attendee (uncredited) |
 | Ron G. Young | .... | Injured Victim (uncredited) |