Main Characters
Fox William Mulder (David Duchovny)
Dana Katherine Scully (Gillian Anderson)
Assistant Director Walter S. Skinner (Mitch Pileggi)
"Cigarette Smoking Man" (William B. Davis)

Other Recurring Roles
Frohike (Tom Braidwood)
Langly (Dean Haglund)
Byers (Bruce Harwood)
William Scully (Don S. Davis)
Margaret Scully (Sheila Larken)
Melissa Scully (Melinda McGraw)
William Mulder (Peter Donat)
Mrs. Mulder (Rebecca Toolan)
Samantha Mulder
"Deep Throat" (Jerry Hardin)
"X" (Steven Williams)
Alex Krycek (Nicholas Lea)