Bufo Alvarius – The Underground Secret (2018)
- Genre: Documentary
- Release Date: 2018-04-05
- Runtime: 1h 36min
- Language: Český
- Production Company: Asaya Production
- Production Country: Czech Republic
- Director: Filip Záruba
- Writer: Filip Záruba
A radical testimony of the strongest known natural psychedelic, tryptamine 5-MeO-DMT produced by Bufo Alvarius, a toad of the Sonoran desert.
Unfortunately the movie Bufo Alvarius – The Underground Secret is not yet available on HBO Max.
| Directing | Filip Záruba | Director |
| Writing | Filip Záruba | Screenplay |
| Crew | Václav Dejčmar | Dramaturgy |
| Camera | Filip Záruba | Camera Operator |
| Camera | Petr Zajac | Camera Operator |
| Editing | Filip Záruba | Editor |
| Visual Effects | Filip Záruba | Animation |
