Acting

2023

(2 episodes) as Special Agent Luca Clark

2021

(1 episode) as Squirrel (voice)

2017

(1 episode) as Howard Wolowitz (voice)

2015		The Late Show with Stephen Colbert (1 episode) as Self - Guest
2015		StarTalk with Neil deGrasse Tyson (1 episode) as Self

2014

(52 episodes) as Napoleon (voice)

2013		Drunk History (1 episode) as Frank M. Robinson
2013		Norm Macdonald Live (1 episode) as Self

2012

(1 episode) as Self

2010		Conan (3 episodes) as Self
2010		Kick Buttowski: Suburban Daredevil (1 episode) as Ronaldo (voice)

2009

(1 episode) as Self - Guest

2008

(3 episodes) as Moist

2007		The Big Bang Theory (279 episodes) as Howard Wolowitz
2007		The Guild (1 episode) as Kevinator
2007		Derek and Simon: The Show (13 episodes)
2007		Reporters (1 episode) as Shooter #5

2006		Studio 60 on the Sunset Strip (14 episodes) as Alex Dwyer
2006		The Jake Effect (1 episode) as Bill Skidelsky

2005		Life on a Stick (1 episode) as Stan (1 episode) as Vinnie
2005		American Dad! (2 episodes) as Dr. Revanche (voice)
2005		The Late Late Show with Craig Ferguson (1 episode) as Self

2004		Joey (4 episodes) as Seth
2004		Quintuplets (1 episode) as Neil

2003		Arrested Development (1 episode) as Jeff
2003		Reno 911! (1 episode) as Hooker Buying Son (1 episode) as Student Driver

2002		Less than Perfect (1 episode) as Arthur
2002		The Funkhousers (1 episode) as Donnie Funkhouser

2001

(1 episode) as Jack

2000

(1 episode) as Billy

1999

(1 episode) as Gus Latrine

1996

(1 episode) as Spokesman

1981

(1 episode) as Self

Production

2019

(4 episodes) … Executive Producer

2007

(13 episodes) … Executive Producer

Creator

2007

… Creator

Writing

2007

(13 episodes) … Screenplay