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.
Jack Hammond
Lawrence Jennings
Larry Jennings
Rex
Wynn Crawford
Samuel Campbell
Samuel Campbell / Shapeshifter
Hans Brauer
Happy Harry Desmond
Morrisey
Paul Winkle
Walter Skinner
Walter Skinner / SS Sturmbannfuehrer
Ernest Darby
Art
Al Dennison
Bull
Dan Burroughs
Steven Caldwell
Dr. Russell Marcus
U.S. Attorney Mark Freestone
Colin Saunders
Terry Waters
Senator Dresden
Saunder's Henchman
Eddie
Al Hawke
Rama Khan
Browne Carter
Max
Bonham Walker
Dr. Stanton (voice)
Commissioner Gordon (voice)
Gordon (voice)
Leonard Kreese
Detective Spivak
Walter Skinner
Harris Ryland
Eddie Ross
Papa
Narrator (voice)
Randall
TRF Group Leader
Internal Affairs Investigator
White Officer
Assistant Director Walter Skinner
Walter Skinner
Colin Dowling
Richard Clayton
Lab Foreman
Sarge
Sheriff Thomas Pembroke
Horace Pinker
Tony the Hitman
Macklin Tyler
Duke Herman
Bill Daley
Dexter Helvenshaw
John Kelly
Thomas J. Watts
Police Chief Jeff Croy
Gunter MacGregor
Sheriff Porter
Carl Rikker
Steven Caldwell
Vince
John Weller
Floyd
Self
Dominique
Warren Jacobi
Captain Keller
Verbeck
Stephens
Professor Charles M. Ridley
Bull Tully
Narrator
Caleb
Woody
Gate AP
Thompson
Miller
Host
Host
Host
Host