The Instigators

Matt Damon Rory Casey Affleck Cobby Ving Rhames Frank Toomey Jack Harlow Scalvo Michael Stuhlbarg Mr. Besegai Alfred Molina Richie Dechico Owen Earls Charlie Haggerty Hong Chau Dr. Donna Rivera Natalie Carter Mrs. Haggerty Walter Liebman Terry André De Shields Mr. Kelly Ron Perlman Mayor Miccelli Rob Gronkowski Rob Gronkowski Toby Jones Attorney Alan Flynn Slate Holmgren Dave Wedge Ronnie Cho Mark Choi Sheika Murray Waiter #1 at Wharf Perry Strong Waiter #2 at Wharf Nick Trice City Hall Employee Tommy Nohilly Police Commissioner Jason Furlani Cabinet Member David Gborie Bouncer Toby Onwumere John Wayne Paul Walter Hauser Booch Scout Backus Colani Nicholas B Alexander Sergeant at Rivera's Office Nathaniel Wood Massachusetts Trooper #1 Craig Hutchinson Massachusetts Trooper #2 Mike Bash Boston Police Officer Deirdre McCourt Vermont Cop Shawn Fitzgibbon Quincy Cop Jerry Kernion Fire Monitor Nik Walker Hero Fireman Ramona Floyd Bartender Mark Steven Dancewicz Tactical Cop Brett Keating Sniper in Tower Michael Rodrick Police on the Roof Eleni Yiovas Senior Tactical Cop Gregory Cunningham Senior Cop at Plaza Peter Morse Cop at Barricade Robert Marsella Cop That Says Hey Don DiPetta Officer at Airport Christopher Brian Roach Police Transfer Officer Billy Smith New Police Commissioner John Noble Barrack Photographer Jadon Cole Rory's Son Robbie Dema Border Patrol Mountie #1 Robert Harvey Border Patrol Mountie #2 Jonathan Gabriel Charles Pollster Craig 'Radio Man' Castaldo Self (uncredited)