Directed by Rob Bowman   Written by Chris Carter   Frank Spotnitz   David Amann   Cast David Duchovny ... Fox Mulder Gillian Anderson ... Dana Scully William B. Davis ... Smoking Man Chris Owens ... Jeffrey Spender Nicholas Lea ... Alex Krycek Mitch Pileggi ... Walter Skinner Mimi Rogers ... Diana Fowley Veronica Cartwright ... Cassandra Spender Laurie Holden ... Marita Covarrubias Tom Braidwood ... Melvin Frohike Dean Haglund ... Richard 'Ringo' Langly Bruce Harwood ... John Fitzgerald Byers Don S. Williams ... Elder #1 Al Ruscio ... Elder #4 Frank Ertl ... Elder #5 James Pickens Jr. ... Alvin Kersh Robert Lipton ... Head Surgeon Peter Donat ... William Mulder Scott Williamson ... CDC Leader Jo Jacob ... Nurse (as Jo Black-Jacob) Mark Bramhall ... Surgical Team Member Uncredited Cast Vanessa Elgrichi ... CGB Spender's Daughter Produced by Rob Bowman   Chris Carter   Bernadette Caulfield   Vince Gilligan   Kim Manners   Lori Jo Nemhauser   Paul Rabwin   Daniel Sackheim   Mark R. Schilz   John Shiban   Frank Spotnitz   Michael W. Watkins   Original Music by Mark Snow

Additional Info Premiere: February 14, 1999 DVD Release: November 05, 2002 Blu-ray Release: December 08, 2015 Country: Distributor: Twentieth Century Fox Websites: Production Companies Ten Thirteen Productions 20th Century Fox Television (in association with) 20th Century Fox Television X-F Productions Distributors Fox Network   (1993) (United States) (original airing) (TV) Fox Network   (2016) (United States) (seasons 10-11) (TV) 20th Century Fox Home Entertainment   (1995) (United States) (Laserdisc) (video) 20th Century Fox Home Entertainment   (1997) (United States) (Laserdisc) (video) 20th Century Fox Home Entertainment   (2000) (United States) (DVD) FX Network   (2001) (United States) (syndication) (TV) The Sci-Fi Channel   (2000) (United States) (repeats) (TV) Walt Disney Television   (2021) (United States) Filming Locations 2397 Barranca Pkwy, Tustin, California, USA Marine Corps Air Station Tustin, Tustin, California, USA   (opening of the episode and the climactic scene) Stage 5, 20th Century Fox Studios - 10201 Pico Blvd., Century City, Los Angeles, California, USA Stage 6, 20th Century Fox Studios - 10201 Pico Blvd., Century City, Los Angeles, California, USA Tustin, California, USA Rating Stats Overall Rating -- / 10 Our Rating -- / 10 Your Friends -- / 10 Male Users -- / 10 Female Users -- / 10 Site Ranking #807 / 21,055 Site Ranking