Features short cameos by Swedish metal legends Erik "E" Danielsson from Watain, Mikael Åkerfeldt from Opeth and Erik "Tyrant" Gustavsson from Nifelheim as discontent prisoners. Åkerfeldt also composed the original music for this series.
The prison warden is played by the late great Hans-Erik Dyvik Husby aka Hank von Helvete / Hank von Hell, best known from the Norwegian death punk band Turbonegro.