William Duffy is an actor, known for The West Wing (1999), It's Always Sunny in Philadelphia (2005) and Scandal (2012).
ER - Season 2
Pitch - Season 1
Parenthood - Season 2
NCIS - Season 17
Banshee - Season 3
NCIS - Season 18
Scandal - Season 6
Third Watch - Season 3
The Event - Season 1
Double Tap (1997)
The Division - Season 1
Blast from the Past
The Mentalist - Season 5
California Dreams - Season 2
Hearts Afire - Season 3
Heroes - Season 1
ER - Season 14
High Incident - Season 1
Third Watch - Season 5
Sniper 3
Hearts Afire - Season 2
Studio 60 on the Sunset Strip - Season 1
The OC - Season 2
Its Always Sunny in Philadelphia - Season 7
California Dreams - Season 1
Beverly Hills 90210 - Season 1