(2004) Saw

as Zep Hindle

(2005) The Legend of Zorro

as Harrigan

(1998) Playing by Heart

as Bosco

(1999) I'll Take You There

as Tom

(2001) Sounds from a Town I Love

as ---

(2012) Batman: The Dark Knight Returns, Part 1

as Joker (voice)

(2013) Batman: The Dark Knight Returns, Part 2

as Joker (voice)

(1997) The Journey

as Michael

(2005) Full Disclosure Report

as Zep Hindle

(2022) Glimpse

as Reg

(1990) Orpheus Descending

as Clown

(2004) Straight-Jacket

as Victor

(2006) Jumping Off Bridges

as Frank Nelson

(2024) Getting LOST

as Self

(2002) The Laramie Project

as Reverend

(2008) Ready? OK!

as Charlie New

(2013) Batman: The Dark Knight Returns

as Joker (voice)

(2005) 29th and Gay

as Gorilla

(1999) For Love of the Game

as Gallery Doorman

(2010) Goldstar, Ohio

as Steve Harper

(2024) Man and Witch: The Dance of a Thousand Steps

as The Evil Wizard

(1998) Grace & Glorie

as Arnold Dudley

(2010) Saw 3D

as Zep Hindle (archive footage) (uncredited)

(2010) The New Man in Charge

as Benjamin Linus

(2002) Unfaithful

as Josh

(1998) The Impostors

as Burtom's Assistant

(2011) Ben 10 - Generator Rex: Heroes United

as Alpha Nanite (voice)

(2011) Person of Interest

as Harold Finch

(2004) Best Week Ever

as Self

(1999) Law & Order: Special Victims Unit

as Allan Shaye

(2002) Without a Trace

as Stuart Wesmar

(1997) The Practice

as William Hinks

(1993) The X-Files

as Oliver Martin

(2004) Lost

as Benjamin Linus

(2005) The Inside

as Marty Manning

(1951) Hallmark Hall of Fame

as Arnold Dudley

(2001) Law & Order: Criminal Intent

as Gerry Rankin

(2001) The Education of Max Bickford

as ---

(2004) Lost

as Henry Gale

(1997) The Practice

as William Hinks (voice)

(2023) My Adventures with Superman

as Brainiac (voice)

(2010) Parenthood

as Andy Fitzgerald

(2012) Arrow

as Cayden James

(2015) The Mystery of Matter: Search for the Elements

as Narrator

(2019) The Name of the Rose

as Abo of Fossanova - The Abbot

(2019) Evil

as Dr Leland Townsend

(2020) Dead Talk Live

as Self - Guest

(2024) Fallout

as Wilzig

(2006) Rachael Ray

as Self

(2004) Lost

as Ben

(2014) Mozart in the Jungle

as Morton Norton

(2009) Late Night with Jimmy Fallon

as Self

(2000) The District

as Man in Bar

(1999) Stark Raving Mad

as Mr. Putnam

(2003) Whoopi

as F. Thomas Erickson

(2024) Elsbeth

as Judge Milton Crawford

(2010) Chronologically Lost

as Ben Linus/Henry Gale