Every family has "roots," but the crazed Zorn clan's are dipped in blood! Teenaged siblings (Shane Briant and Gillian Hills) with a forbidden attraction to one another, a father (Robert Hardy) who keeps them locked away because he thinks they’ve inherited their mother’s madness, a shady scientist (Patrick Magee) with a supposed cure, and a series of gruesome murders make for an especially grisly and offbeat Hammer shocker. With Yvonne Mitchell and Manfred Mann lead singer Paul Jones. AKA: "Blood Evil." 89 min. Widescreen; Soundtrack: English; Subtitles: English.