William Duffy is an actor, known for The West Wing (1999), It's Always Sunny in Philadelphia (2005) and Scandal (2012).
Scandal - Season 5
ER - Season 13
Sniper 3
NCIS - Season 18
California Dreams - Season 5
Bosch - Season 3
The Mentalist - Season 2
The Big C - Season 2
Scandal - Season 4
Bosch - Season 4
Its Always Sunny in Philadelphia - Season 2
Its Always Sunny in Philadelphia - Season 1
Scandal - Season 1
Scandal - Season 6
Its Always Sunny in Philadelphia - Season 9
Its Always Sunny in Philadelphia - Season 4
Third Watch - Season 5
Criminal Minds - Season 7
Heroes - Season 2
Waist Deep
Scandal - Season 3
American Dreams - Season 2
ER - Season 10
The Mentalist - Season 4
ER - Season 14
The Division - Season 1