The Guest

S1, E10: Barney's squad is assigned to protect a government witness, whom a crime syndicate wants to silence. Herb Edelman guest stars as Schuster, an accountant for the syndicate who has turned witness against the mob and is being moved around the city for his protection. Schuster is convinced the syndicate will discover where he is, and his fear is confirmed when a phone call for him is received at the station house.