William Duffy is an actor, known for The West Wing (1999), It's Always Sunny in Philadelphia (2005) and Scandal (2012).
Its Always Sunny in Philadelphia - Season 12
NCIS - Season 13
Bosch - Season 6
Parenthood - Season 5
Studio 60 on the Sunset Strip - Season 1
Third Watch - Season 2
NCIS - Season 17
A West Wing Special to benefit When We All Vote
Its Always Sunny in Philadelphia - Season 13
California Dreams - Season 5
American Dreams - Season 1
The Event - Season 1
ER - Season 15
Beverly Hills 90210 - Season 8
Third Watch - Season 5
The OC - Season 4
The OC - Season 1
Third Watch - Season 4
Waist Deep
Beverly Hills 90210 - Season 6
The Division - Season 1
Third Watch - Season 1
ER - Season 9
Beverly Hills 90210 - Season 7
Bosch - Season 1
Heroes - Season 4