Dunning added more high-profile projects to his resume, including the sprawling miniseries “Vanity Fair” (A&E, 1999), based on William Makepeace Thackeray’s acclaimed novel, and “Death’s Shadow” (A&E, 2000), a murder mystery about the slaying of a prominent real estate developer (Dominic Jephcott) that shakes up a wealthy community. After playing a gynecologist in Jim Sheridan’s Oscar-nominated “In America” (2002), Dunning portrayed Sir Henry Clinton, commander of the British forces during the American Revolutionary War in “Benedict Arnold: A Question of Honor” (A&E, 2003) – a telefilm which explored the events leading to a decorated soldier (Aidan Quinn) betraying his country. He next played Attalus, general to Philip II of Macedonia (Val Kilmer), in Oliver Stone’s dreadful historical epic, “Alexander” (2004). Following small roles in “Malice Afterthought” (PBS, 2005) and “The Inspector Lynley Mysteries, Series 5” (PBS, 2006), Dunning portrayed Thomas Boleyn, 1st Earl of Wiltshire and father of the doomed Anne Boleyn, in “The Tudors” (2007- ), Showtime’s lavish 10-part series depicting a young and fit King Henry VIII (Jonathan Rhys Meyers) prior to his split from the Catholic Church.