(at around 1h 21 mins) Rebecca Romijn revealed that in a scene where she sews up a knife wound on Thomas Jane, she pushes the needle too far in and ends up actually sewing a couple of stitches on Thomas Jane's body instead of just the prosthetic wound.
Jonathan Hensleigh actually knew someone who parked illegally for two years in Manhattan by using the same bogus fire hydrant ploy Frank Castle uses to keep Livia's parking space open during his schemes.
Thomas Jane initially turned down the role twice, as well as a part in X-Men (2000), as he didn't see himself as a superhero actor. He only became interested in the character after being asked to play him for the second time and he had seen Timothy Bradstreet's artwork of the character.
(at around 1h 30 mins) The declaration that Frank Castle writes near the end of the film, listing the basis of his vigilante philosophy in numbered order, form the beginning of his war journal, an ongoing diary of his campaign against organized crime. It was the basis for the long-running comic book "The Punisher War Journal".
Five identical Pontiac GTOs were built (two were completely destroyed) for the movie. This muscle car was chosen in order to distance the film from the earlier Australian version of The Punisher (1989) (in which action star Dolph Lundgren rode a motorcycle).
Thomas Jane returned as Frank Castle in the 2012 short film The Punisher: Dirty Laundry (2012). Which sees Castle punishing a gang that assaulted a group of prostitutes and Castle giving one of his signature t-shirts to a boy, whom the gang mugged.
When the teaser trailer was shown, there was negative reaction to the solid white skull logo which has been the character's trademark in the books. The costume designer changed it to a "worn-down" design that better suited Frank Castle's character in the film.
Jonathan Hensleigh was dismayed before filming began when he learned that he wasn't going to be given sufficient budget for a top flight action movie. He felt he needed in the region of $64 million but was only given $15 million instead, and only 52 days to shoot the picture. Hensleigh had to rewrite a lot of his original script to accommodate this reduction in budget and shooting schedule.
With the supervision of a trainer, Thomas Jane worked out extensively for the role with two hours of weight lifting and cardio, sometimes twice a day and a rigorous diet of health shakes. Jane also trained with multiple firearms and weaponry.
Shooting in Tampa was a double-edged sword. On one hand, the city's downtown area has no residential areas so it would be completely emptied out by the end of the working day - ideal for a film crew. But the city is also prone to lightning storms that roll in suddenly and very violently. The summer that the film crew shot in Tampa was the city's wettest since 1890.
Seeing as he had only one involvement with the creation of the original Punisher character; (changing the character from 'The Assassin' to 'The Punisher') this is one of the few movies based on a Marvel Comic in which Stan Lee does not appear.
The Castle family house in Puerto Rico is really restrooms/changing rooms located in Honeymoon Island State Park, Dunedin, Florida. State Parks adhere to strict rules about color of their buildings, the restrooms/changing room where re-painted from their original grey to the colors seen in the movie, they remain that color since the movie was released.
(at around 6 mins) When shooting the surprise retirement party for Frank Castle (Thomas Jane) after the success of the major sting, the group of extras behind the table were directed to make simple cheers once Thomas Jane walked in. This scene was shot several times because a certain actor kept fumbling his lines. On one such entrance of Thomas Jane, he commended the extras and told them that he actually felt like they were real and sincere with their praise for him.
John Travolta allowed Thomas Jane to have his name first in the credits and advertising so that he could work on this project. In fact, he didn't mind it at all, allowing Jane to be put over so he can get recognition as the main character.
Despite never actually interacting, Thomas Jane and John Travolta both starred in Face/Off (1997). Jane played one of the inmates at the federal prison in which Sean Archer as "Castor Troy" infiltrates.
Frank's tenement building was located at the corner of N. Nebraska Ave. and E. Zack St., directly across the street from the Tampa Amtrak station. It was a fairly well known local landmark due to it's unusual shape, but has since been demolished.
Many of the characters, including Joan, Bumpo, Spacker Dave and The Russian, all come from the punisher series "Welcome Back, Frank", written by Garth Ennis and illustrated by Steve Dillon and Jimmy Palmiotti. Timothy Bradstreet illustrated the covers, along with the promotional posters for the movie.
Jonathan Hensleigh wanted the music to be very emotional. When scoring the film, composer Carlo Siliotto saw Frank Castle as a tragic figure stating, "This man, Frank Castle, is somebody who has a slaughtered family. He comes through that slaughter, and becomes a punisher. But he's a sad man - he drinks, and he has bad memories always coming to him. There's a lot in the film, and at times it is like a modern version of classic tragedy like "Othello."
Scenes were constantly scaled back or cut to meet budget requirements. Effects scenes were almost always done the old-fashioned way with old tricks replacing new CGI. Jonathan Hensleigh discusses this in the commentary track of the original DVD edition
The weapon Castle uses in the final shootout is a Colt M4A1 carbine, a shortened version of the M16 rifle. Castle's is modified with a flat-top upper receiver with a Picatinny-type accessory rail, an M203 40mm grenade launcher , and an Aimpoint M68 Close Combat Optic.
A sequel was planned but couldn't get off the ground. Director Jonathan Hensleigh, star Thomas Jane, and screen writers could not agree. Various screen writers came on board and departed the project. Eventually Hensleigh left. Finally Thomas Jane left after the search for a new director that agreed with his vision of the sequel, failed. The project was then scrapped. One of the screenplays would eventually be reworked into Punisher War Zone.
When Castle is readying himself to administer the coup de grace to Saint, he attaches a shoulder stock to a pistol. This is presumably supposed to be a Glock 18, a version of the Glock 17 9mm capable of fully automatic fire. This is uncertain, however, since the piece never appears again in the film.
The song that Joan listens to on the radio, which is also heard during the end credits "Broken" by Seether and Amy Lee. Seether vocalist Shaun Morgan stated in an interview that the song is about dealing with the pain of leaving someone behind. The film depicts Frank Castle struggling to depict with the tragic loss of his family whom he misses.
Rebecca Romijn appeared as the shape-shifting anti-heroine Mystique in another Marvel comics film adaptation, the first X-Men trilogy. As a nod to that character (specifically her blue skin), Romijn often wears blue clothing throughout the film.
The Saints and Sinners Club shootout between Frank Castle and Howard Saint's goons was originally longer, but was cut because of pacing and explicit bloodshed. The only two scenes that were altered because of violence were: 1: The point-blank head shot featured blood squirting from the back of a thug's head. 2: The scene in which a thug is dispatched by way of sawed-off shotgun was also cut. The original scene feature pieces of the thug being sprayed from his wounds.
(at around 1h 35 mins) The scene when Howard Saint visits Quentin Glass in his home at night was actually shot in the middle of the afternoon. The evening effect was achieved by tenting up the real-life house that was being used as Glass's home.
The director's cut of the film features a subplot in which it is revealed that Jimmy Weeks (A. Russell Andrews) gave information to the Saints about the Castles in order to settle a gambling debt effectively betraying Frank (Thomas Jane). Frank discovers this and then, in a very dark scene, forces Jimmy to commit suicide. The idea was cut from the theatrical film for pacing reasons.
(at around 1h 19 mins) The scene in which hot oil is tossed on to The Russian was scaled back due to excessive violence. Originally, blood was supposed to pour from The Russian's eyes, but it was deemed "too much" by the MPAA.
All the piercings that Ben Foster (Spacker Dave) wears in the movie are fake, except for the eyebrow one. In the scene where Will Patton (Quentin Glass) removes them one by one, a prosthetic was made for the eyebrow one so that it could be taken out without injuring Ben.
Frank Castle manipulating Howard Saint into murdering Livia Saint and Quentin Glass, by making Saint think that Livia and Glass are having an affair was written as a nod to Licence to Kill (1989) - James Bond manipulates Franz Sanchez into killing Milton Krest, by making Sanchez think Krest hired someone to kill him.
Unlike the comics, The Punisher's signature symbol, the skull is given a backstory: In the film, Castle's son Will gives Castle a black t-shirt he bought for him as a gift and Will tells Castle that the skull wards off evil spirits. The skull inspires Castle to become The Punisher and Castle makes the skull his signature symbol as The Punisher.
In the film, Howard Saint blames Castle for the death of his son Bobby and when Castle confronts him at the end of the movie he says "You killed my son". Castle maybe responsible for Bobby Saint's death, but Castle didn't actually kill him. Castle as Otto Krieg collapsed and played dead when he gets shot by Jimmy Weeks and Bobby Saint was in fact shot and killed one of the other FBI agents in the shootout.