Skip to content

Featured Popular Top Rated Upcoming Now Playing

Featured Popular Top Rated Airing Today On The Air

Action Adventure Animation Comedy Crime Documentary Drama Family Fantasy History Horror Music Mystery Romance Science Fiction TV Movie Thriller War

Search movies and TV series

Search movies and TV series

Featured Popular Top Rated Upcoming Now Playing

Featured Popular Top Rated Airing Today On The Air

Action Adventure Animation Comedy Crime Documentary Drama Family Fantasy History Horror Music Mystery Romance Science Fiction TV Movie Thriller War

Every movie and series, one place to find it.

Search movies and TV series

Loading content…

Discover where to watch movies and TV series online. Browse trending titles, streaming availability, ratings, trailers, cast and full episode guides — all in one place.

Movies

Featured
Popular
Top Rated
Upcoming
Now Playing

TV Series

Featured
Popular
Top Rated
Airing Today
On The Air

Discover

Trending
Free to Watch
Browse Genres
Search

© 2026 Watch Free Online Movies. All rights reserved.

This product uses the TMDB API but is not endorsed or certified by TMDB. Watch Free Online Movies does not host or stream any media — it links to where titles are legally available.

Loading title details…

Home/William Duffy

Known for: Acting
Gender: Male
Credits: 28

William Duffy

Biography

William Duffy is an actor.

Known For

84%User score 84 percent

The Mentalist

2008 · Crime · Drama

76%User score 76 percent

NCIS

2003 · Crime · Drama

73%User score 73 percent

Law & Order

1990 · Crime · Drama

83%User score 83 percent

Criminal Minds

2005 · Crime · Drama

83%User score 83 percent

The West Wing

1999 · Drama

83%User score 83 percent

It's Always Sunny in Philadelphia

2005 · Comedy

72%User score 72 percent

Scandal

2012 · Drama

75%User score 75 percent

Heroes

2006 · Sci-Fi & Fantasy · Drama

73%User score 73 percent

Beverly Hills, 90210

1990 · Drama

79%User score 79 percent

Bosch

2015 · Mystery · Drama

77%User score 77 percent

The O.C.

2003 · Drama

75%User score 75 percent

Parenthood

2010 · Drama

71%User score 71 percent

The Division

2001 · Drama

52%User score 52 percent

American Dreams

2002 · Drama · Family

Full Filmography(28)

2020A West Wing Special to Benefit When We All VoteLarryFilm
2015BoschVault Attendant · 1 episodesTV
2012ScandalRalph Greenwald · 1 episodesTV
2010The AscentThomas ShawFilm
2010

ParenthoodMr. Carlson · 1 episodes

TV

2008The MentalistTSA Agent #2 · 1 episodesTV

2007CarpoolersTV

2006KarlaDetective PorterFilm

2006Waist DeepNewscaster #2Film

2006HeroesER Doctor · 1 episodesTV

2005Criminal MindsDr. Larson · 1 episodesTV

2005It's Always Sunny in PhiladelphiaHedge Fund Guy · 1 episodesTV

2004Sniper 3Richard AddisFilm

2003The O.C.(voice) · 1 episodesTV

2003NCISHarris Cobb · 1 episodesTV

2002American DreamsFather Gregory · 1 episodesTV

2001The DivisionCommander Jackson · 1 episodesTV

1999Blast from the PastWorkman #1Film

1999The West WingStaffer · 46 episodesTV

1997Double TapGas ManFilm

1994Betrayed by LovePaxtonFilm

1992Hearts AfireDoctor · 1 episodesTV

1990The Two JakesDesk SergeantFilm

1990Law & OrderCSU Technician · 1 episodesTV

1990Beverly Hills, 90210Doorman · 1 episodesTV

1977Death GameExecutive ProducerFilm

1970LovingJayFilm

1965BrainstormOrderly (uncredited)Film

William Duffy | Watch Free Online Movies