10 Things You Don't Know About is an American history/biography television series on H2. It was initially presented by historian David Eisenbach for one season. Eisenbach was succeeded as host by musician Henry Rollins for the next two seasons. Each episode of the show presents ten facts about a particular historical figure, group, event, or aspect that are not widely known among the general public. Each fact is accompanied by relevant clips and, during Rollins's tenure, interviews with experts, as well as man-on-the-street interviews. The first season also featured results of an online poll surrounding the ten facts.
 The episodes originally ran for 30 minutes (with commercial breaks) each during Eisenbach's tenure; the episodes became twice as long when Rollins took over hosting duties.
 The show's first season, which featured Eisenbach, aired on February 27, 2012, running through May 7, 2012. The second season, featuring Rollins, began airing on November 2, 2013. The third season, also hosted by Rollins started on August 16, 2014.
 A&E Home Video released the first season of the series on DVD on August 28, 2012.
 This episode explores little-known details of the life of one of America's founding fathers.
 The private life of America's 16th president is explored.
 Lesser-known details about the life of America's 35th president.
 The truth about the first Director of the Federal Bureau of Investigation, J. Edgar Hoover.
 The truth about the exaggerated events and personalities involved in the gunfight at the O.K. Corral.
 Secrets of Franklin and Eleanor Roosevelt are explored.
 This episode explores lesser-known facts about Mormonism and its followers since the church's founding.
 Colombian drug lord Pablo Escobar's life is examined.
 Little-known facts about American World War II general George S. Patton are explored.
 The life of Roman Emperor Caligula is profiled.
 Little-known fact about Adolf Hitler's life.
 Features the group of actors known as The Rat Pack.
 
 This episode explores the assassins and wannabe assassins of American Presidents.
 Little-known facts about The White House are explored.
 Lesser-known details about the life of America's founding fathers.
 This episode explores Prohibition and the little-known facts surrounding it.
 This episode explores little-known details surrounding the U.S. flag and anything connected to it.
 This episode explores little-known details surrounding the U.S. state of Texas.
 This episode explores little-known details surrounding the American Civil Rights Movement and beyond.
 This episode explores little-known facts about Thomas Edison and Nikola Tesla and the uneasy relationship between them.
 This episode explores little-known details surrounding the American Revolution.
 This episode explores little-known details surrounding the Hoover Dam.
 This episode explores little-known details surrounding marijuana, especially its place in the United States.
 This episode explores little-known details surrounding money in general, with some focus on money within the context of the United States.
 This episode explores little-known details surrounding the history of Las Vegas and its culture.
 This episode explores little-known details surrounding the California Gold Rush.