In 1957, Evan Rendell flees after his father is lynched for killing multiple patients in his effort to find a replacement heart for his ailing wife. After 35 years, Evan escapes from a mental institution and returns to town for revenge, killing off residents one by one. When Jennifer and her friends break into the Rendell house out of morbid curiosity, Evan notices Jennifer has a heart condition similar to his mother and decides to make her his final victim.
Unfortunately the movie Dr. Giggles is not yet available on HBO Max.
| Directing | Manny Coto | Director |
| Camera | Robert Draper | Director of Photography |
| Editing | Debra Neil-Fisher | Editor |
| Production | Jack Roe | Executive Producer |
| Sound | Brian May | Original Music Composer |
| Production | Mike Richardson | Co-Producer |
| Production | Karen Rea | Casting |
| Crew | Robert Kurtzman | Makeup Effects |
| Production | Stuart M. Besser | Producer |
| Writing | Graeme Whifler | Writer |
| Writing | Manny Coto | Writer |
| Art | Bill Malley | Production Design |
| Crew | Howard Berger | Makeup Effects |
| Crew | Greg Nicotero | Makeup Effects |
| Art | Alan Locke | Art Direction |
| Art | Cecilia Rodarte | Set Decoration |
| Costume & Make-Up | Sandra Culotta | Costume Design |
| Costume & Make-Up | E. Larry Day | Key Makeup Artist |
