The Duppy
- Episode aired Sep 16, 2021
![Onyx Monster Mysteries (2020)](https://m.media-amazon.com/images/M/MV5BMDFhZjUwN2QtNjg5ZS00OWJiLTkzYTUtYzQ0YjUzODhmOWQyXkEyXkFqcGdeQXVyMjIyOTUyNzM@._V1_QL75_UY281_CR31,0,190,281_.jpg)
The kids enter Mirthell's dreams to investigate the monster that's causing his nightmares.The kids enter Mirthell's dreams to investigate the monster that's causing his nightmares.The kids enter Mirthell's dreams to investigate the monster that's causing his nightmares.