A pair of mad doctors conduct a "sexperiment" on the viewer by showing a series of bizarre movies featuring lesbian zombies and video vixens. The film features various short films from Andrew Shearer's Gonzoriffic Films, including: Powerless, Bikini Gorilla, Mae of the Dead, Barbara, The Gash and more.
Unfortunately the movie The Underground Sinema is not yet available on HBO Max.
| Directing | Andrew N. Shearer | Director |
| Writing | Andrew N. Shearer | Writer |
| Writing | Dee Flowered | Writer |
| Crew | Emily Castrato | Cinematography |
| Editing | Pamela Bloodworth | Editor |
| Sound | Tonjia Atomic | Songs |
| Sound | Filthy Issue | Songs |
