The theme was a top ten hit in the United Kingdom, peaking at number two on the UK Singles Chart.
When the show was hitting its peak in popularity, Carter created a spin off to the series, entitled Millennium which aired from 1996–1999.
At the start, Carter and the producers wanted Snow to focus on using synthesizers to craft heavily ambient soundscapes.
The biggest difference was that he used MIDI files to save his musical scores and pieces, which would go to a copyist who would take it through one of their programs and eventually give it to the orchestrators.
[2] The sixth season episode "The Unnatural" marked the first time in the series that the show recorded the score with musicians rather than synthesizers.
While Snow has been confirmed to be more positive to it than negative, saying it fit "perfect", and further stating, "Every once in a while, when Chris would pick out a pop song or whatever, he would always make really great choices and I thought that was a good one.
Carter and his production crew wanted as much secrecy for the film as possible, forcing Snow to sign a contract when receiving the script.
[2] When composing the music for The X-Files: I Want to Believe, Snow said it was "different" from the previous film which followed the show's mytharc storyline about the government conspiracy with aliens.
He said it was much "more heart, warmth and tuneful music" since this film was much more based around Fox Mulder (David Duchovny) and Dana Scully's (Gillian Anderson) relationship.
When making the music, Snow used many instruments such as a "battery of percussion", taiko drums and whistle with live singers, among other things.
He used no trumpets and no high woodwinds when recording, but used up to eight french horns, five trombones, two piano, one harp, thirty-two violins, sixteen violas twelve cellos and eight basses.