During filming Martin Richardson's cape had two swatches sewn into it; both were screen used Superman capes used on other films, one being from Christopher Reeve's cape from Superman the Movie (1978) and one from Brandon Routh's cape from Superman Returns (2006).
In the scene in the back of the van, Riley can be heard saying that the "best bad guys are British" - this is in reference to the fact that all of the bad guys in the film are played by British cast members.
The film came about after a telephone call Gene Fallaize had with some studio reps, in which he joked about doing a Superman movie. A subsequent telephone call was made offering Fallaize the opportunity to direct the film, on the basis that it was produced as a fan-film.
The scenes set at the fictional Daily Chronicle newspaper building in London were actually shot at the building of the Northampton Chronicle newspaper in Northampton, and featured only two actors, the rest were actual reporters from the real newspaper.
The scene where Alex Luthor meets with the Private Detective was originally meant to take place inside a car, but the car was involved in an accident the day before the scene was due to be shot, so it was changed at the last minute to take place in a multi-story car park instead.
The scenes set outside the entrance to the Daily Planet were shot at the entrance to the University of Westminster in London on a busy day during the summer, and hundreds of people stopped to watch filming.
The scene where the robbers mug a woman was shot outside Janet Street-Porter's house in London. During filming she assumed it was a student project and started shouting at the crew before leaving in a taxi. She later realized her mistake, and apologized on national television the next day on Loose Women (1999).
Incorporates elements from all previous Superman films in the 'Donnerverse': 1 Opening titles sequence (SI, II, IV, SR); 2 John Williams' music (all); 3 Gene Hackman and Margot Kidder as Lex Luthor and Lois Lane (SI-IV); 4 Clark Kent whistling Mozart (S4); 5 Lois's relationship with Richard White (SR); 6 New York City as Metropolis; 7 Superman's blood sample (retrieved in SR); 8 Superman in his apartment snuggling up with a blanket (S4); 9 Perry's speech about "Good reporter's don't get great stories..." (S1); 10 Grant and Riley as Luthor's henchmen (Both characters appear in SR); 11 Clark's use of the word 'Swell' (SI, SIV), 12 The appearance of Superman's Fortress of Solitude (all); 13 Luthor's love-affair with Land (SI, SR); 14 Superman saying "I'm always around" (SR); 15 The amnesia-kiss (SII TC).
The end of the opening scene where the Guards exit the NASA building was re-shot after principal photography because Director Gene Fallaize felt the version originally shot was too boring and wouldn't hold audiences interest.
The production and release deadlines for this film were extremely tight and were set months before filming, because any delay would have meant it was released too close to Man of Steel (2013) and would have subsequently delayed production of Dark Ascension (2017).
Martin Richardson was cast from over 1000 applicants for the lead role in what was advertised as a 'superhero' film. None of the actors knew it was for a Superman film until they walked into the audition room as Elstree Studios where the Producers were waiting along with a mannequin wearing the Superman costume. Richardson later said it was "very daunting" auditioning with the costume in the room.
The teaser posters released before the film was shot featured Superman's body in his costume but without his head. This was because 'Martin Richardson' hadn't yet been cast as Superman, and instead co-producer Tom Toal wore the costume for the photo-shoot.
The main costume design for Superman was altered slightly for copyright issues, including the 'S' shield and the cape, even though the filmmakers had access to a full CR costume and used it to take measurements and sizes.
One week before filming started the Producers were at the Cannes Film Festival and there was no camera kit, no lighting, and no DoP for the film. 48 hours before the shoot Gene Fallaize and Tony Cook met with Stephen Bell-Young, and pulled it together.
The idea behind Rycke the janitor accidentally discovering Clark Kent's identity as Superman was to allude to sequel, but Director Gene Fallaize stated he had no intention of a sequel, but to keep audiences guessing.
In the scene where Ali realizes Clark's identity as Superman, she picks up drawing of concept alternative costume designs Superman has designed for himself. One of them is the same costume he wears later in the film. Another one can be seen of a Kick-Ass (2010)-style costume design.
The 'disguise' Superman costume of him in a black T-shirt with a red 'S' seem in the second half of the film features the same T-shirt that Superman wore as Superboy in the comic-book history of the character.
The final shot of the movie is nearly entirely computer-generated. Only Martin Richardson's face is real; the Earth, space, and all of Superman except his face are all CG made by Francesco Accattatis who is well-known for his Internet videos that remember Christopher Reeve.