2014		Late Night with Seth Meyers (3 episodes) as Self
2014		The Tonight Show Starring Jimmy Fallon (2 episodes) (2 episodes) as Self

2013		The Blacklist (218 episodes) as Raymond 'Red' Reddington
2013		The Frame (1 episode) as James Ballard

2006

(11 episodes)

2005		The Reichen Show (1 episode) as Self - Guest
2005		The Office (25 episodes) as Robert California
2005		The Late Late Show with Craig Ferguson (1 episode) as Self

2004

(101 episodes) as Alan Shore

2003		The Ellen DeGeneres Show (2 episodes) as Self
2003		Celebrities Uncensored (1 episode) as Self

1997		The View (5 episodes) as Self
1997		The Practice (22 episodes) as Alan Shore

1996

(2 episodes) as Self

1993		Frasier (1 episode) as Steven (voice)
1993		Late Night with Conan O'Brien (4 episodes) as Self - Guest

1992

(1 episode)

1989

(1 episode) as Jason 'Stanky' Hanky

1988

(1 episode)

1983

(6 episodes)

2013

(22 episodes) … Co-Executive Producer (196 episodes) … Executive Producer