These two Hammer films were both made and released in 1971 the artwork for this double-bill contains all the artwork and taglines from the first release of ‘Twins of Evil’ changing slightly the “A New TERROR FILLED X FILM” and positioning it centrally for the double-bill presentation changing the wording to “A New GIGANTIC TERROR-FILLED X PROGRAMME”. The ‘HAMMER HORROR’ of the original release becomes ‘DOUBLE HAMMER HORROR.’ The extent of the popularity of Hammer Horror films with the cinema going audience is proven by the releases of the films in different presentations in the same year.