In the first episode of Season 4 titled 'Bad Magic | The Man in the Linen Pants,' the chilling story of Greg Davis's arrest and mysterious death intertwines with the narrative of Dr. Serhat Gumrukcu, a controversial figure in HIV treatment trials. Filmmaker Zeb's documentation of his friend Jeffrey's participation in an experimental trial reveals ethical dilemmas and concerns about exploitation in the medical field. As Zeb navigates the complexities of trust and deception, he confronts the stark contrasts between patients' struggles and the glamorous lifestyle of those overseeing such trials, setting the stage for unanswered questions about medical integrity and the implications of groundbreaking treatments.