William Duffy

William Duffy

Acting

Biography

William Duffy is an actor.

Known For

The Mentalist

The Mentalist

TSA Agent #2

Law & Order

Law & Order

CSU Technician

NCIS

NCIS

Harris Cobb

Criminal Minds

Criminal Minds

Dr. Larson

It's Always Sunny in Philadelphia

It's Always Sunny in Philadelphia

Hedge Fund Guy

The West Wing

The West Wing

Staffer

Beverly Hills, 90210

Beverly Hills, 90210

Doorman

Heroes

Heroes

ER Doctor

Bosch

Bosch

Vault Attendant

Scandal

Scandal

Ralph Greenwald