1. Ted Kaczynski, aka the Unabomber, who killed three people and terrorized the nation for 17 years before we arrested him in 1996. Details
2. John Dillinger, the notorious gangster whose death at the hand of FBI agents in the summer of 1934 helped make Hoover’s “G-Men” a household name. Details
3. John Glover, FBI agent, who became the first African-American to head an FBI field office when he was named Special Agent in Charge in Milwaukee in 1979. He later became Executive Assistant Director at FBI Headquarters. Details
4. Clarence Kelly, who served as FBI Director following J. Edgar Hoover’s death, guiding the Bureau through some difficult days of criticism and change. Details
5. Charles Appel, the FBI agent who helped give birth to the Bureau’s first technical laboratory, forerunner of today’s FBI Laboratory. Details
6. & 7. Ethel and Julius Rosenberg, who were caught by the FBI during the Cold War passing American secrets on the atomic bomb to the Soviets. Details
8. & 9. Fox Mulder and Dana Scully, played by David Duchovny and Gillian Anderson, a pair of FBI agents who investigated the supernatural in the 1990s TV series, The X-Files.
10. Jack Graham, a disturbed delinquent who packed a dynamite bomb in his mother’s suitcase, killing her and all on board a flight out of Denver in 1955. Details
11. Patty Hearst, the young heiress whose dramatic kidnapping by the Symbionese Liberation Army in 1974 and subsequent involvement in bank robberies stunned the nation. Details
12. John Gotti, aka the “Teflon Don,” the infamous Mafioso who eluded the law for years until the FBI and its partners put him away for good in 1992. Details
13. J. Edgar Hoover, the FBI Director who served from 1924 to 1972—nearly a half century—shaping the Bureau into a more professional and capable organization. Details
14. & 16. Bonnie and Clyde, the love-struck crime couple who robbed and murdered their way across the Midwest before being gunned down by a band of lawmen in 1934. Details
15. Alger Hiss, a government official and Soviet spy who was convicted of perjury in 1950. Details
17. Alaska Davidson, who served as a Bureau special agent from 1922 to 1924. Davidson and two contemporaries in the 1920s—Lenore Houston and Jessie Duckstein—are a few of the women known to have served as FBI agents before 1972.
18. Usama bin Laden, terrorist leader of al Qaeda, wanted for his role in several major attacks on the United States, including the simultaneous strikes of 9/11. Details
19. George “Machine Gun” Kelly, the gangster who—according to legend—cried, “Don’t shoot, G-Men, don’t shoot,” when surrounded by Bureau agents in 1933. Whether he actually said it or not, the “G-Men” nickname eventually became synonymous with special agents of the FBI. Details
20. James Amos, Teddy Roosevelt’s confidant and bodyguard, who later became a Bureau special agent, serving from 1921 to 1953. Details
21. Efrem Zimbalist, Jr., the iconic face of the FBI from 1965 to 1974, when he starred as Inspector Lewis Erskine in the prime-time TV show, The FBI.
22. Mark Felt, Deputy Director of the FBI during the Watergate years who later admitted that he was “Deep Throat,” an infamous source of leaks to the press on the investigation.
23. Helen Gandy, who served as the personal secretary of Director Hoover during his nearly five decades at the helm, becoming almost as well known as the Director himself.
24. Lee Harvey Oswald, who assassinated President John F. Kennedy in Dallas in November 1963 before being murdered by Jack Ruby. Despite many conspiracy theories to the contrary, the FBI’s massive investigation found that Oswald acted alone.
25. Timothy McVeigh, who committed the worst act of domestic terrorism in U.S. history when he bombed a federal building in Oklahoma City in 1995, killing 168 people and injuring several hundred more. Details
26. Velvalee Dickinson, the so-called “Doll Woman,” who used her doll shop on Madison Avenue in New York City to send coded messages revealing U.S. military secrets to the Japanese during World War II. Details
27. Al Capone, the legendary gangster who ruled an empire of crime in the Windy City during the 1920s until law enforcement (with help from the FBI) sent him to Alcatraz in 1931. Details
28. Charles Bonaparte, Teddy Roosevelt’s progressive Attorney General who launched a force of special agents on July 26, 1908, marking the beginning of the organization that would become the FBI. Details
29. Alvin Karpis, a cunning crook who teamed with the Barker brothers and became one of the FBI’s most hunted gangsters during the 1930s. Details
30. Charles Arthur “Pretty Boy” Floyd, another Depression-era gangster who took part in the infamous “Kansas City Massacre” before being tracked down and killed by Bureau agents in 1934. Details
31. Edwin Shanahan, the first Bureau special agent to die in the line of duty after being shot by a car thief named Martin Durkin in 1925. Details
32. Jimmy Stewart, the famous actor who played an amiable, hardworking agent named Chip Hardesty in the 1959 movie, The FBI Story.
33. Robert Hanssen, FBI agent turned Soviet mole who was arrested for espionage in February 2001 and later sent to prison for life. Details
34. Lester Gillis, aka “Baby Face Nelson,” a psychopathic killer and prolific bank robber who lost his life in a deadly gunfight with Bureau agents in 1934. Details
35. Charles “Lucky” Luciano, the Sicilian mobster who is credited with making the American Mafia what it is today before being deported to Italy in 1946. Details
36. D.B. Cooper, the mysterious mid-air hijacker who jumped from a plane with $200,000 in stolen cash on a stormy November night in 1970 and has never been seen again. Details
37. Kate “Ma” Barker, mother of the notorious outlaws Herman, Lloyd, Arthur, and Fred Barker, who lost her life in a fierce firefight with Bureau agents in Florida in 1935.
38. James Earl Ray, who was tracked down by the FBI and convicted of the 1968 murder of civil rights leader Dr. Martin Luther King, Jr.
39. A KKK member. The FBI has battled this band of hate-mongers since the early 1920s, when we put away Imperial Kleagle Edward Clarke. Details
40. Ramzi Yousef, mastermind of the 1993 World Trade Center bombing and wanted terrorist who was ultimately arrested in Pakistan in 1995 and brought to justice in the United States. Details