Introduction to the series by Frank Spotnitz

David Duchovny Fox Mulder Gillian Anderson Dana Scully Mitch Pileggi Walter Skinner William B. Davis Cigarette Smoking Man Robert Patrick John Doggett Tom Braidwood Melvin Frohike Bruce Harwood John Fitzgerald Byers Dean Haglund Richard 'Ringo' Langly Annabeth Gish Monica Reyes Nicholas Lea Alex Krycek James Pickens Jr. Alvin Kersh Sheila Larken Margaret Scully Chris Owens Jeffrey Spender Steven Williams Mr. X