Aaron Paul

Aaron Paullanded this small-screen gig in 2001, appearing inThe X-Files’ninth season.

Jack Black

Jack Blackfound his spot onThe X-Filesas Bart “Zero” Liquori.

She played an unnamed member of the audience at theLazarus Bowlscreening.

Shia LaBeouf

Fox

David Alan Grier

David Alan Grierfound himself near Driver in the episode from 2000.

He played another audience member at the Hollywood movie showing.

Tea Leoni

Dana Scully got a new look in 2000, thanks toTea Leoni.

Octavia Spencer

Fox

The actress depicted Scully in the movie about the agents.

Her character is a leukemia patient whose father goes through dark avenues in an attempt to save her.

The actor played Emil, a teenager who has an encounter with a UFO.

Aaron Paul

Fox

She played a well-educated scientist who assists Mulder and Scully on a project in the Arctic.

Kathy Griffin

Kathy Griffinfound a spot onThe X-Filesin 2000.

CCH Pounder

CCH Pounderpopped up inThe X-Files' second season.

Lily Tomlin

Fox

She appeared as Agent Lucy Kazdin, an FBI employee who works with the Hostage Rescue Team.

He joined the sixth season as a man whose life is torn apart by military tests.

He played Quinton “Roach” Freely in 1995, returning as Henry Weems in 1998.

Jack Black

Fox

Lucy Lawless

Xena herself stopped byThe X-Filesin 2001.

Burt Reynolds

Burt ReynoldsgracedThe X-Fileswith his presence in 2002.

Jane Lynch

Eight years beforeGlee,Jane Lynchhit the small screen in a 2001 episode ofThe X-Files.

Minnie Driver

Fox

Ryan Reynolds

Ryan Reynoldslanded one of his first roles thanks toThe X-Files.

David Alan Grier

Fox

Tea Leoni

Fox

Lucy Liu

Fox

Seth Green

Fox

Felicity Huffman

Fox

Kathy Griffin

Fox

CCH Pounder

Fox

Bryan Cranston

Fox

Willie Garson

Fox

Lucy Lawless

Fox

Burt Reynolds

Fox

Jane Lynch

Fox

Ryan Reynolds

Fox