Jeremy Piven and Rebecca Eaton with Matt Lauer

Best known as Ari Gold, the agent you love to hate on HBO’s “Entourage,” Emmy and Golden Globe winner Jeremy Piven has one of Hollywood’s most diverse resumes.

Piven surprised audiences by taking on the title role in the British series “Mr. Selfridge,” about the real-life department stores mogul, which airs on "Masterpiece" on PBS. Go behind the scenes of the show as he talks with "Masterpiece" executive producer Rebecca Eaton and “Today”’s Matt Lauer about the making of Selfridge, the upcoming Entourage film and what’s next for Jeremy Piven.