Hallie appears regularly on documentary, news and current event programmes for TV and Radio. In addition to being a regular contributor to Mysteries at the Museum (Travel Channel, USA) she has featured on programmes such as:

• London: 2000 Years of History, Channel 5 (2019)
• Beyond The UnKnown, Travel Channel (2019)
• Private Lives, Yesterday (2018)
• Private Lives of the Monarchs, Yesterday (2017)
• Botticelli’s Venus: The Making of An Icon, BBC4 (February, 2016)
• Quizeum, BBC4 (April, December 2015)
• Harlots, Housewives and Heroines, BBC 4 (June 2012)
• Haunted London, Travel Channel USA (July 2012)
• The Great Fire of London, the Yesterday Channel (Nov 2012)
• Des Racines & Des Ailes; Londres, France 3 (May 2012)
• The Best of Enemies; A Love/Hate History of Britain and France, Arte France (June 2012)
• Red Hot History: Casanova, History Channel Canada (2012)
• Find My Past: Royal Scandal, The Yesterday Channel (December 2011)
• Mud Men, History Channel (March 2011)
• Titanic: The Mission, Channel 4 (October 2010)
• The Untold Great Fire, Channel 4 (June 2010)
• History Cold Case, BBC2 (May 2010)
• The Beauty of Maps, BBC4 (April 2010)
• The Age of Excess: When Britain Went Too Far BBC4 (October 2007)
• Balderdash & Piffle, X Rated BBC2 (June 2007)
• The History of Prostitution Sky One (June 2006)
• The Cinema Show BBC4 (February 2006); as a reviewer of Lasse Hallstrom’s Casanova; and
• as Living With the Dead’s historian (season 2, Living TV, 2009)