John Wayne Gacy: A Monster in Disguise
Episode 21 · 1999-01-25

- Documentary
Episode overview
Examine the horrifying double life of one of America’s most notorious serial killers, presenting his crimes through a factual, victim‑centered lens. The episode traces how Gacy cultivated an image of a friendly suburban contractor and community volunteer — even performing as “Pogo the Clown” — while secretly committing acts of devastating violence against young men and boys. Through interviews with investigators, neighbors, and surviving family members, Biography details the painstaking police work that uncovered the truth beneath Gacy’s façade, leading to the discovery of dozens of victims buried beneath his home. Archival footage and case records reveal how his charm masked deep cruelty, and how his arrest shocked the nation. The program offers a sober, unsettling portrait of a predator who hid in plain sight, emphasizing the enduring impact on victims’ families and the community he terrorized.
60 minutes
Season 7 episodes
1. David Berkowitz: Son of Sam1998-03-23
2. Mao Tse Tung: China's Peasant Emperor1998-03-30
3. Amelia Earhart: Queen of the Air1998-04-06
4. Angela Lansbury: A Balancing Act1998-04-13
5. Anne Frank: The Life of a Young Girl1998-04-20
6. Beethoven: The Sound and the Fury1998-04-27
7. Colonel Sanders: America's Chicken King1998-05-04
8. Dwight D. Eisenhower: Commander-in-Chief1998-05-11
9. Ernest Hemingway: Wrestling With Life1998-05-18
10. Evel Knievel: Hell on Wheels1998-05-25
11. Howard Carter: Triumph and Treasure1998-06-01
12. Jackie Kennedy Onassis: In a Class of Her Own1998-06-08
13. Jim Jones: Journey into Madness1998-06-15
14. John Wayne: American Legend1998-06-22
15. P.T. Barnum: The Greatest Showman on Earth1998-06-29
16. Ray Kroc: Fast Food McMillionaire1998-07-06
17. Satan: Prince of Darkness1998-07-13
18. Vincent Van Gogh: A Stroke of Genius1998-07-20
19. Charles Lindbergh: Against the Wind1999-01-07
20. Fred Gwynne: More than a Munster1999-01-18
21. John Wayne Gacy: A Monster in Disguise1999-01-25
22. Nicolae Ceausescu: The Unrepentant Tyrant1999-02-01
23. The Tiffanys: Mark of Excellence1999-02-08
44. Dean Martin: Everybody Loves Somebody1995-09-04
63. Butch Cassidy and the Sundance Kid1995-10-20
67. Nostradamus: Prophet of Doom1995-11-06