Clearly
Jon Hamm isn't too concerned with upsetting powerful people, as evidenced by his latest appearance on "
Late Show" (Weeknights, 11:35 p.m. EST on CBS). When asked by David Letterman to explain what he could about the lengthy break between the fourth and fifths seasons of "
Mad Men," Hamm said, "I've described it thusly, and I got in trouble, so I'll do it again the same way."According to Hamm, "When billionaires fight it takes a lot ...