Chris Carter offered fans a glimpse at a rough cut of the trailer for the movie, which featured the new tagline "Believe Again."

Screened at the William S. Paley Television festival in Hollywood on March 26, the trailer featured a bit of dialogue between Fox Mulder (David Duchovny) and Dana Scully (Gillian Anderson):

Mulder: "Scully. I need you on this with me."

Scully: "I know. That's what scares me."

It featured quick cuts of footage of uniformed men searching a snowfield, led by a white-haired man played by Billy Connolly; someone dragging a body; Mulder in a car being hit by another vehicle; a glimpse of cast member Callum Keith Rennie; Scully hitting someone over the head with a blunt object; the discovery of a body buried in ice; and other images, some of which were also previewed at WonderCon in San Francisco last month.

The trailer ends with a voiceover bit of dialogue between Connolly's character and Mulder as viewers see an image of Mulder and Scully climbing out of a helicopter:

Connolly's voice: "Do you believe in these kind of things?"

Mulder's voice: "Let's just say I want to believe."

The finished trailer will debut in movie theaters along with Iron Man on May 2, a Fox spokesman told SCI FI Wire. The second as-yet-untitled X-Files movie opens July 25.