A forensic investigation into a single LP: Dr. John, the night tripper's Gris-gris. Two-Headed Doctor is a forensic investigation into a single LP: Dr. John, the night tripper's Gris-gris. Though released in 1968 to poor sales and a minimum of critical attention, Gris-gris has accumulated legendary status over subsequent decades for its strangeness, hybridity, and innovative production. It formed the launch...