<P> During production, the filmmakers went to great lengths to preserve secrecy, including printing the script on red paper to prevent photocopying, and leaking disinformation to the media and giving the film the codename "Project Blackwood". The code was cracked by fans who speculated on the meaning behind it . During the North Texas scene, "Blackwood County" can be seen on the fire trucks responding to the infected boy . According to Spotnitz, "Blackwood" held no particular significance . </P> <P> At the beginning of the pre-production phase, Carter and Bowman were busy with the television series, leaving Sackheim to work alone . Sackheim hired executive producer Lata Ryan, who had previously collaborated with Steven Spielberg for his 1993 film, Jurassic Park . Once hired, Ryan was allowed to read the script in front of the Ten Thirteen Productions staff members--but not to take it away . At this time, most of the staff members had not read the script for themselves . After Ryan accepted the offer of becoming executive producer, Chris Nowak was hired as production designer, Ward Russell as director of photography and Bill Liams as construction coordinator . According to Ryan, they had secured all key personnel six weeks before principal filming began . </P> <P> Both Carter and Spotnitz wanted to make the film "bigger" than the series, so they decided to start and end the film at an "extreme place" and explain aspects of the story arc that the show had not . While gathering research materials, they learned that the Earth was once covered with ice and decided to open the film in Texas in 35,000 BC with human "Primitives" as the first characters to appear . </P> <P> The film included known actors from the show such as David Duchovny as Fox Mulder, Gillian Anderson as Dana Scully, Mitch Pileggi as Walter Skinner and William B. Davis as the Cigarette Smoking Man, as well as new actors and characters to the franchise . These included Martin Landau and Blythe Danner . The signing of these actors broke with what had become tradition for The X-Files . Carter had purposely cast virtually unknown actors for the television series, to make it more believable; "As soon as you put in an actor whose face is very recognizable, you've got a situation that works against the reality of the show ." He saw creating the film as a chance to break this rule . He offered Glenne Headly the small role of a bartender . A fan of the show, she accepted enthusiastically . </P>

When do the x files movies fit in