Erwin Romulo, the late Alexis Tioseco’s best friend, recalls the events after the critic and his girlfriend Nika Bohinc’s untimely death in their home in Quezon City. Diaz makes use of one long take to allow Romulo an uninterrupted narration of the events. The pain of recalling is palpable.
Unfortunately the movie An Investigation on the Night That Won't Forget is not yet available on Paramount Plus.
| Directing | Lav Diaz | Director |
| Production | Kristine Kintana | Producer |
| Sound | Willy Fernandez | Sound Designer |
| Production | Hazel Orencio | Production Supervisor |
| Production | Priscilla Tapales Orencio | Producer |
| Crew | Hazel Orencio | Translator |
| Crew | Lav Diaz | Cinematography |
| Editing | Lav Diaz | Editor |
| Writing | Lav Diaz | Writer |
