Beautifully restored on blu ray this edition of prince of darkness includes an extra disc filled with extra features including a brand new documentary.deep in the basement of an abandoned church, once run by a sinister religious sect, lies a strange bottle of green liquid being investigated by a group of local theoretic physics students'. '.strtoupper('b')ut as the night draws in the students soon realise that the strange relic holds a dark and powerful force beyond their control'. '.strtoupper('a') force that could well be the essence of pure evil the remains of satan himself'. '.strtoupper('e')xtrasmalevolent unearthing john carpenter's prince of darkness a brand new feature length documentary featuring interviews with cinematographer gary kibbe, actor peter jason, actor alice cooper, composer alan howarth, script supervisor sandy king, visual effects supervisor robert grasmere, stunt coordinator jeff imada, carpenter biographer john muir, film historian c'. '.strtoupper('c')ourtney joyner, music historian daniel schweiger and producer larry francointro by john carpenter – an interview with director john carpenter originally recorded for a french dvd release in 2003scene analysis by john carpenter director john carpenter analyses key scenes from prince of darkness, in an interview from 2003audio commentary with john carpenter and peter jasonsympathy for the devil interview with john carpenter from 2013horror's halloween hallowed grounds with sean clark a fun tour of the film's locations hosted by sean clarktrailerphoto gallery incl'. '.strtoupper('b')ehind the scenes