William Duffy is an actor, known for The West Wing (1999), It's Always Sunny in Philadelphia (2005) and Scandal (2012).
Tyson
The Division - Season 3
Its Always Sunny in Philadelphia - Season 15
Third Watch - Season 6
NCIS - Season 17
The Division - Season 2
Beverly Hills 90210 - Season 2
Scandal - Season 1
Heroes - Season 1
Studio 60 on the Sunset Strip - Season 1
The Mentalist - Season 3
Bosch - Season 2
ER - Season 7
Beverly Hills 90210 - Season 6
Third Watch - Season 1
A West Wing Special to benefit When We All Vote
Parenthood - Season 4
Third Watch - Season 4
ER - Season 15
Beverly Hills 90210 - Season 9
ER - Season 11
Its Always Sunny in Philadelphia - Season 9
The West Wing - Season 7
Third Watch - Season 3
Hearts Afire - Season 3
The West Wing - Season 6