The X-Files

: See also The X-Files (books) and The X Files Movie

Regular guest cast

• Charles Cioffi - Section Chief Scott Blevins (1993, 1997)
• Jerry Hardin - Deep Throat (1993–1996, 1999)
• Tom Braidwood - Melvin Frohike (1994–2002)
• Dean Haglund - Richard "Ringo" Langly (1994–2002)
• Bruce Harwood - John Fitzgerald Byers (1994–2002)
• Don S. Davis - Bill Scully (1994)
• Steven Williams - X (1994–1997, 2002)
• Melinda McGraw - Melissa Scully (1994–1995, 1997)
• Sheila Larken - Margaret Scully (1994–1997, 2001–2002)
• Brian Thompson - Alien Bounty Hunter (1995–1996, 1998–2000)
• Brendan Beiser - Agent Pendrell (1995–1997)
• Rebecca Toolan - Teena Mulder (1995–1997, 1999–2000)
• Peter Donat - William Mulder (1995–1996, 1999)
• Floyd "Red Crow" Westerman - Albert Hosteen (1995, 1999)
• Don S. Williams - The 1st Elder (1995–1999)
• John Neville - The Well-Manicured Man (1995–1998)
• Laurie Holden - Marita Covarrubias (a.k.a. Unablonde) (1996–2000, 2002)
• Pat Skipper - Bill Scully, Jr. (1997)
• Karri Turner - Tara Scully (1997)
• John Finn - Michael Kritschgau (1997, 1999)
• Jeff Gulka - Gibson Praise (1998, 2000, 2002)
• Veronica Cartwright - Cassandra Spender (1998–1999)
• Mimi Rogers - Diana Fowley (1998–1999) - Rogers was credited as 'Special Guest Star'
• Michael McKean - Morris Fletcher (1998–1999, 2002)
• Adam Baldwin - Knowle Rohrer (2001–2002)
• Cary Elwes - Assistant Director Brad Follmer (2001–2002)
• James & Travis Riker - Baby William (2001–2002)