William Duffy is an actor, known for The West Wing (1999), It's Always Sunny in Philadelphia (2005) and Scandal (2012).
The Big C - Season 1
California Dreams - Season 1
Third Watch - Season 2
ER - Season 7
Heroes - Season 2
Bosch - Season 1
The Invaders - Season 1 (1995)
Beverly Hills 90210 - Season 4
The Mentalist - Season 1
Beverly Hills 90210 - Season 7
Scandal - Season 3
ER - Season 12
The Mentalist - Season 5
The Mentalist - Season 7
ER - Season 9
The Two Jakes
American Dreams - Season 3
The West Wing - Season 7
Its Always Sunny in Philadelphia - Season 12
California Dreams - Season 4
Banshee - Season 2
Scandal - Season 4
Banshee - Season 1
NCIS - Season 18
Parenthood - Season 6
High Incident - Season 2