The shockwave from the exploding ocean liner shattered dozens of windows in East Boston.

Jeff Bridges and Tommy Lee Jones are good friends in real life. Also they were both considered to play Snake Plissken in Escape from New York (1981), before Kurt Russell got the part.

A piece of shrapnel from the exploding bomb came within several feet of striking Jeff Bridges.

Jeff Bridges turned down the lead role in Speed (1994) to do this film. That was also a mad bomber movie released in the same year as this film.

MGM had such confidence in the finished film, that they delayed the film from its original April 1994 release date to the busy summer July 94 hoping it would be a surprise hit.

The two EMS people, who rush in at MIT, were not extras, but were there for medical coverage, for the actors, from Boston EMS, which only cover the City of Boston. Unless they are going to help with a police action, bomb incident or warrant serving.

Loyd Catlett, who plays Bama, is Jeff Bridges' stand-in and stunt double in this film, and several other films.

Although they are really father and son, Lloyd Bridges and Jeff Bridges are cast as uncle and nephew in the movie.

The "pair of ragged claws" that Tommy Lee Jones refers to in the beach scene is from "The Love Song of J. Alfred Prufrock" by T.S. Eliot.

The scene at Fenway Park, was filmed during an actual game that took place Saturday, August 14, 1993, between the Toronto Blue Jays and Boston Red Sox. The Blue Jays would defeat the Red Sox 5-2 and won the World Series later that year.

Just before the scene where Jimmy claims to have contacted Interpol, a newspaper is shown with the headline "Dichotomy evident as NOW meets in Boston". This appeared in July 2, 1993 Boston Globe.

Boston City Hall was used for the exterior shots for Police Headquarters. At the time of filming, BPHQ was located at 350 Stuart Street, roughly a block from the John Hancock Tower. City Hall is 1 City Hall Square, essentially between Fanueil Hall (to the East) and 1 Center Plaza (to the West).

Stephen Rea refused a major role in this project.

Richard Harris was considered for the role that went to Lloyd Bridges.

The film cast includes four Oscar winners: Tommy Lee Jones, Jeff Bridges, Cuba Gooding Jr. and Forest Whitaker.

There is a scene, where a copy of the Boston Globe is seen, with an article reading "2 More Bomb Squad Officers Killed in Mystery Blast". Behind it, you can see the Business section with a headline "Bay State Bankruptcy Filings...". This article appeared in the July 1, 1993 Boston Globe.

The Boston Fire Fighter towards the back of Jeff Bridges, is still on the job, and is the brother of the President of the Boston Fire Fighters Union IAFF local 718. His name is Mr. Ed Paris.

Kevin Bacon, Alec Baldwin, Michael Biehn, Bruce Campbell, Kevin Costner, Michael Douglas, Richard Dreyfuss, Harrison Ford, Richard Gere, Mel Gibson, Michael Keaton, Christopher Lambert, Viggo Mortensen, Chuck Norris, Dennis Quaid, Mickey Rourke, Kurt Russell, Arnold Schwarzenegger, Tom Selleck, Sylvester Stallone, Patrick Swayze and Bruce Willis were considered to play Jimmy Dove.

Jeff Bridges and Tommy Lee Jones have appeared in the Marvel Cinematic Universe. Bridges appeared in Iron Man (2008) and Jones appeared in Captain America: The First Avenger (2011). Captain America also had music composed by Alan Silvestri, as well as this film.

Towards the end when Kate gets distracted and almost rear ends an Oldsmobile but when she goes around it in the next shot the front end of a Thunderbird is seen.

John Finn and Ruben Santiago-Hudson would later play police Captains on television programmes: Finn on Cold Case (2003) and Hudson on Castle (2009).

John Finn, who appears in this movie as Jeff Bridges' boss Captain Fred Roarke, appeared in another film with Tommy Lee Jones, The Hunted (2003).

The statue of the man with the arrows embedded in him, which Gaerity dresses Max up as, is Saint Sebastian.

The building where Max was "Blown Away", is now condominiums in Charlestown. It was originally a Catholic school, which was closed in a cutback by the Archdiocese of Boston.

Despite being the antagonist, Tommy Lee Jones gets dispatched approximately twenty minutes before the end of the film.

Jeff Bridges appeared in two mad bomber movies, which were this film, and Arlington Road (1999) with Oscar winners Tommy Lee Jones and Tim Robbins respectively. Both movies are similar, but very different, especially with the endings.