William Duffy is an actor, known for The West Wing (1999), It's Always Sunny in Philadelphia (2005) and Scandal (2012).
Parenthood - Season 5
California Dreams - Season 5
Its Always Sunny In Philadelphia - Season 10
The West Wing - Season 3
The Mentalist - Season 1
Its Always Sunny in Philadelphia - Season 1
The Big C - Season 2
The West Wing - Season 4
Third Watch - Season 6
Bosch - Season 2
The Division - Season 3
American Dreams - Season 2
ER - Season 11
NCIS - Season 16
The Invaders - Season 1 (1995)
Third Watch - Season 2
The West Wing - Season 6
A West Wing Special to benefit When We All Vote
Scandal - Season 7
Bosch - Season 3
Its Always Sunny in Philadelphia - Season 15
Scandal - Season 1
NCIS - Season 13
The OC - Season 3
Banshee - Season 1
American Dreams - Season 1