We already know that the third season of “Bridgerton” will focus on Penelope Featherington and Colin Bridgerton. But now that production has started, we’re finding out about the new cast members who’ll help them tell the story – Daniel Francis, Sam Phillips, and James Phoon. Daniel will play Marcus Anderson, a possible suitor for Pen. Sam is set to be Lord Debling, described as a genial lord with unusual interests. And James will be the handsome, yet dim-witted, Harry Dankworth.