Acting

—		We Are Men 8 episodes as Frank Russo
—		LIVE with Kelly and Mark 0 episodes
—		Stark Raving Mad 22 episodes as Ian Stark

2023		The Jennifer Hudson Show 1 episode
2023		The Kelly Clarkson Show 1 episode

2022

1 episode as Luigi (voice)

2021

1 episode as Self

2020		Central Park 2 episodes as Marvin (voice)
2020		Peacock Presents: The At-Home Variety Show Featuring Seth MacFarlane 1 episode as Adrian Monk / Self
2020		Stars in the House 2 episodes as Self

2019		A Little Late with Lilly Singh 1 episode as Self
2019		Under A Rock with Tig Notaro 1 episode as Self - Guest

2018

1 episode as Self

2017

43 episodes as Abe Weissman

2016		BrainDead 13 episodes as Senator Red Wheatus
2016		The Blacklist 1 episode as Alistair Pitt

2014

2 episodes as Self

2007

1 episode as Self

2006

1 episode as Self

2005		Late Night with Conan O'Brien 1 episode as Self - Guest
2005		Good Day Live 1 episode as Self

2004

1 episode

2003

2 episodes as Self

2002

125 episodes as Adrian Monk

2000

1 episode as Self 1 episode as Taxi Cab Driver

1999

1 episode as Albert Shepley

1997

2 episodes as Jeebs (voice)

1996		The Rosie O'Donnell Show 1 episode as Self - Guest
1996		Frasier 1 episode as Manu
1996		Almost Perfect 1 episode

1995		Gargoyles 1 episode
1995		The X-Files 1 episode as Dr. Chester Ray Banton

1992

1 episode as Jerry Valentine (voice)

1991

145 episodes as Antonio Scarpacci

1987

1 episode

1986

1 episode as Terrorist Leader

Production

2004

2 episodes … Executive Producer

2002

125 episodes … Producer