“Unforgettable,” which was almost canceled by CBS after season one, has its sights set on going global. A source tells us that Poppy Montgomery, Dylan Walsh and several other cast members spent their entire Saturday afternoon holding court at a meet-and-greet for foreign journalists. The actors later feasted at the Old Homestead Steakhouse in the Meatpacking District, where they dined on $350 Japanese Kobe steak washed down with Cabernet from Chile.