Has someone ever handed you a movie, not telling you one thing about it, only telling you to watch it. What if that tape was the personal home video of two sociopaths on a killing spree? This is their home movie, for their eyes-only. This is August Underground's Penance. The third and final film in the AU franchise directed by Fred Vogel and starring Cristie "Crusty" Whiles. Penance shows the dark decline of the two nameless killers from the previous films as they continue to videotape their madness on their path to destruction.
| Actor | Role |
|---|---|
 Fred VogelPeter Mountain | Peter Mountain |
 Cristie WhilesCrusty | Crusty |
| SShelby VogelWoman at party | Woman at party |
 Jerami CruisePartier with Baseball Cap | Partier with Baseball Cap |
| AAnthony MatthewsNail-Covered Victim | Nail-Covered Victim |
| RRob SteinbrueggeIntro Victim | Intro Victim |
| TTalia BeckerNot listed | Not listed |
| LLucious RidgewoodNot listed | Not listed |
| EEd LaughlinGutted Victim | Gutted Victim |
| FFuctupHomeless person | Homeless person |
| BBubthe lion | the lion |
| WWallyNot listed | Not listed |
| BBramaNot listed | Not listed |
| MMatt RizzuttoCrusty's Lover | Crusty's Lover |
| AAutumn SmithLydia | Lydia |