William Duffy is an actor, known for The West Wing (1999), It's Always Sunny in Philadelphia (2005) and Scandal (2012).
NCIS - Season 13
Parenthood - Season 3
The OC - Season 2
Heroes - Season 3
Its Always Sunny in Philadelphia - Season 14
The West Wing - Season 3
Karla
Its Always Sunny in Philadelphia - Season 5
Beverly Hills 90210 - Season 10
Its Always Sunny in Philadelphia - Season 6
California Dreams - Season 3
Scandal - Season 4
Third Watch - Season 5
Beverly Hills 90210 - Season 5
Third Watch - Season 2
Bosch - Season 1
Banshee - Season 1
The West Wing - Season 1
The West Wing - Season 5
ER - Season 9
The West Wing - Season 2
Its Always Sunny In Philadelphia - Season 10
The Big C - Season 4
The OC - Season 4
Scandal - Season 6
California Dreams - Season 1