May 20th
- 1956 – Douglas Preston was born.
- 1957 – John Skipp was born.
- 1960 – A Passage for Trumpet first aired on television.
- 1965 – Herman's Happy Valley first aired on television.
- 1989 – Identity Crisis first aired on television.
- 1989 – Mannequins of Horror first aired on television.
- 1990 – The Gift first aired on television.
- 2005 – Dominion: Prequel to the Exorcist went to theaters.
- 2011 – Let It Bleed first aired on television.
- 2011 – The Man Who Knew Too Much first aired on television.