David Duchovny and Gillian Anderson

Diyah Pera/20th Century Fox

Some Mulder and Scully fans were dubious when the title for the new movie based on their favorite TV show was announced: "The X-Files: I Want to Believe."

How, the skeptics wondered, could the two former FBI agents be anything but true believers after years of encountering aliens, monsters, ghosts and everything else that might go bump in the night?

But so-called X-Philes want to believe in this franchise that started way out on the fringes and eventually brought the creepy and paranormal into the mainstream. The feeling among its creators is mutual.

"We want to believe in the audience," said David Duchovny, who reprises his role as Fox Mulder, the guy with boogeymen on the brain, costarring with Gillian Anderson as his soul mate and doubting Thomas, science-minded Dana Scully.

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Devoted as fans might be, it's a leap of faith for "The X-Files" to return after such a long absence in an era when so many franchises compete for audiences' attention and sequels tend to come every two or three years.

It's been a decade since the first "X-Files" movie and six years since the series went off the air after nine seasons.

The keepers of "The X-Files" figure the long wait has only fired up fans even more for a new adventure. In an interview with The Associated Press alongside Duchovny, Anderson and producer Frank Spotnitz, series creator Chris Carter described the reception he got at a fan gathering in Chile, where he had no idea the show had such a following.

"It was wild and warm and enthusiastic. They had an expo where they re-created Mulder's desk," said Carter, who also directed the new movie and co-wrote it with Spotnitz. "It was just amazing to be sitting there eating sunflower seeds (Mulder's favorite snack) at Mulder's desk in Chile."

Anderson recalled a similar reaction when they appeared earlier this year at New York Comic Con, a fan convention.

"The response that we got from the audience was almost, it was crazy. That was kind of the beginning of my realizing, people do still care," Anderson said. "I also think it's gotten passed down through the generations to kids of people who first watched it on TV."

"The X-Files" debuted in 1993 and quickly won a loyal cult audience. Strong word of mouth gradually drew more and more fans to the weird show with its ongoing story arc about alien visitations to Earth and clever stand-alone stories that one week might deal with life-sucking bugs unleashed from old-growth timber, and another week might touch on monstrous humans resulting from generations of inbreeding.

At the heart was Mulder, a brilliant FBI agent convinced his sister was abducted by aliens. Nicknamed "Spooky" by derisive colleagues, Mulder handled the X-Files, cases involving unexplained phenomena the bureau would prefer to sweep under the rug.

Scully, a medical doctor, was assigned as Mulder's partner, mainly to debunk his work, but she eventually became his comrade in arms, the two complementing each other's talents and maintaining a deep but chaste romantic longing.