Expediente X: Creer es la clave (2008) de Chris Carter

• Título original: The X-Files 2: I Want to Believe
• Título en Estados Unidos: The X Files: I Want to Believe
• Año: 2008
• País: Estados Unidos
• Idioma(s): Inglés
• Director(es): Chris Carter
• Guionista(s): Chris Carter, Frank Spotnitz
• Fotografía: Bill Roe
• Banda sonora: Mark Snow
• Intérpretes: David Duchovny (Fox Mulder), Gillian Anderson (Dana Scully), Amanda Peet (ASAC Dakota Whitney), Billy Connolly (Father Joseph Crissman), Xzibit (Agent Mosley Drummy), Mitch Pileggi (Walter Skinner), Callum Keith Rennie (2nd Abductor - Janke Dacyshyn), Adam Godley (Father Ybarra), Nicki Aycox (2nd Victim - Cheryl Cunningham), Alex Diakun (Gaunt Man), Fagin Woodcock (1st Abductor - Franz Tomczeszyn), Marco Niccoli (Christian Fearon), Carrie Ruscheinsky (Margaret Fearon), Spencer Maybee (Blair Fearon), Veronika Hadravá (Female Assistant), Denis Krasnogolov (Male Assistant), Patrick Keating (Slight Man), Stephen E. Miller (Feed Store Proprietor), Xantha Radley (Monica Bannan), Lorena Gale (On Screen Doctor)
• Compañía(s): 20th Century Fox, Crying Box Productions, Dune Entertainment III, Ten Thirteen Productions
• Duración: 1h 44m