David Marciano is an American actor best known for his television roles as Ray Vecchio in Due South (1994-1996) and as Detective Steve Billings in the crime drama television series The Shield, from 2005-2008.
He currently stars as Virgil in the psychological thriller television series Homeland, since 2011.
As a series regular, Marciano has had the honour of working with such entertainment luminaries as Steven Bochco, who brought Marciano into America's homes on a weekly basis in Civil Wars as the poet bicycle messenger, Jeffrey Lassick.
His second series was the CBS drama Due South, created by Oscar winner Paul Haggis, for which he earned a Gemini Award nomination. Marciano was able to bring his flair for comedy to the buddy cop genre on the streets of Chicago as Detective Ray Vecchio.
Next Marciano completed a four-year run as a regular cast member of the FX Emmy-Award winning drama The Shield as old school detective Steve Billings.
Marciano's other credits include numerous television guest spots and movies, as well as a starring role as Giorgio in the CBS miniseries The Last Don and The Last Don II.
Among the projects of which he is most proud was his participation in director Leslie Dektor's CLIO Award-winning commercial campaign for Partnership for a Drug-Free America.