Mitchell Craig "Mitch" Pileggi (born April 5, 1952) is an American actor. Pileggi is known for playing FBI assistant director Walter Skinner on the long-running popular series The X-Files. He also had a recurring role on Stargate Atlantis as Col. Steven Caldwell. He appeared in the 2008 film, Flash of Genius.
Lawrence Jennings
Larry Jennings
Jack Hammond
Rex
Walter Skinner
Walter Skinner / SS Sturmbannfuehrer
Samuel Campbell
Samuel Campbell / Shapeshifter
Wynn Crawford
Happy Harry Desmond
Hans Brauer
Art
Ernest Darby
Bull
Morrisey
Paul Winkle
Steven Caldwell
Dan Burroughs
U.S. Attorney Mark Freestone
Terry Waters
Dr. Russell Marcus
Al Dennison
Rama Khan
Senator Dresden
Walter Skinner
Colin Saunders
Browne Carter
Commissioner Gordon (voice)
Gordon (voice)
Bonham Walker
Dr. Stanton (voice)
Harris Ryland
Saunder's Henchman
Eddie
Leonard Kreese
Detective Spivak
Narrator (voice)
Eddie Ross
Al Hawke
Papa
Max
Randall
TRF Group Leader
Internal Affairs Investigator
Colin Dowling
White Officer
Richard Clayton
Assistant Director Walter Skinner
Lab Foreman
Walter Skinner
Sheriff Thomas Pembroke
Dexter Helvenshaw
Sarge
Duke Herman
Horace Pinker
Tony the Hitman
John Kelly
Bill Daley
Macklin Tyler
Thomas J. Watts
Sheriff Porter
Carl Rikker
Steven Caldwell
Vince
Police Chief Jeff Croy
Gunter MacGregor
John Weller
Warren Jacobi
Stephens
Professor Charles M. Ridley
Floyd
Thompson
Self
Bull Tully
Woody
Dominique
Gate AP
Captain Keller
Miller
Caleb
Narrator
Verbeck
Host
Host
Host
Host