He’s not going to yell at you. And he’s certainly not going to hurl a computer monitor across the room if he doesn’t get his way. In fact, if you think the 47-year-old actor is anything like the hotheaded agent he played on HBO’s Entourage, you’d be mistaken. Jeremy Piven builds characters, believable characters, and he’s doing it again on PBS’ Mr. Selfridge. Before you know it, he just might be Hollywood’s next great action-movie star.