Benjamin Franklin's lesser-known activities included owning slaves, visiting sex clubs, and being suspected of serial killing.

Secrets about Abraham Lincoln are revealed.

JFK's pre-presidency activities included a courier job in Nazi Germany, body building, and enjoying danger.

Controversial facts about J. Edgar Hoover are revealed including the first gay spy ring and sexual blackmail.

Little-known facts about the OK Corral, including the fact that the shootout did not actually occur there; Wyatt Earp's reputation as more of a pimp than a lawman; Doc Holliday's final fate.

Historian David Eisenbach reveals secret details about the private lives of Franklin and Eleanor Roosevelt, including FDR's long-running affair with his wife's secretary and Eleanor's relationship with a female news reporter.