Religio Guignol. Fanatic (also known as Die! Die! My Darling!) comes from director Silvio Narizzano and features a screenplay by Richard Matheson, based on Anne Blaisdell’s novel "Nightmare." The film includes performances by Tallulah Bankhead, Stefanie Powers, Peter Vaughan, Yootha Joyce, Donald Sutherland, and Maurice Kaufmann. Wilfred Josephs composed the music, with Arthur Ibbetson handling cinematography. Pat Carroll (Powers) decides to pay a visit to Mrs. Trefoile (Bankhead), the mother of the man she was seriously dating before his death in an automobile accident. Her intentions aren’t well received; instead, Pat finds herself caught up in a whirlwind of religious fervor and maternal insanity. This movie combines elements of the Psycho-Biddy genre with Hammer Films' series of one-word titled thrillers inspired by Psycho, resulting in a truly bizarre film experience. It isn’t confusing or overly complicated, but rather exists within its own campy, feverish world—a place where Baby Jane seems almost serene. However, it doesn't quite reach the heights of other films in this wickedly entertaining horror subgenre. The movie is surprisingly captivating thanks to a collection of performances that have to be witnessed to truly appreciate. Even though the film occasionally wanders and includes repetitive scenes focused on Pat Carroll’s difficulties, there’s something oddly delightful about Bankhead and the rest of the cast reveling in this Hammer-style carnival of horrors. Stories suggest Tallulah Bankhead was intoxicated throughout filming; regardless, she delivers a powerful performance as a tough woman who doesn't tolerate foolishness, full of the extravagance the story calls for. Joyce and Vaughan would later become well-known comedic actors in Britain, but here they portray serious and unsettling characters—the latter even brandishing a shotgun in what seems like an unsubtle visual gag. Donald Sutherland’s performance isn’t great, but it's not really his fault; the character he plays is written as a simpleton, essentially just there to add to the film’s freak show elements. Stefanie Powers, however, who appears youthful and vibrant, manages to avoid criticism because her controlled acting style distracts from the story’s absurdity. Restrictions are in place: lipstick is forbidden, sex is prohibited, even the color red is banned, and Religio Guignol reigns supreme. It's difficult to wholeheartedly recommend this film, but it’s strange enough to warrant seeking out as a unique item. 6/10

Source on TMDB