William Joshua Hopkins , best known as Josh Hopkins, is an American actor. He portrayed Paul Allen in the 1999 film Pirates of Silicon Valley, and Raymond Milbury on the television series Ally McBeal (2001 to 2002). He portrayed sexy Charlie Babcock on the television series Pepper Dennis (2006). He later worked with his former Ally McBeal co-star Calista Flockhart when he had a recurring role on Brothers & Sisters. Now Hopkins stars on the hit ABC show Quantico as FBI agent Liam O'Connor.