"Frankenstein Must Be Destroyed" (1969) is a British horror film directed by Terence Fisher, notable for its compelling blend of gothic atmosphere and psychological horror. The film is the fifth installment in Hammer Films' Frankenstein series, featuring Peter Cushing reprising his role as the ruthless and morally ambiguous Baron Victor Frankenstein.

Set in a fog-drenched Victorian era, the story follows the obsessive and ethically corrupt Baron Frankenstein as he continues his ghastly experiments to conquer death. This time, he coerces a young doctor, Karl Holst (played by Simon Ward), and his fiancée, Anna (Veronica Carlson), into aiding him in transplanting the brain of a dying colleague, Dr. Brandt, into a healthy body. The plot intensifies as Frankenstein's methods grow more unscrupulous, leading to a series of gruesome and morally questionable acts.

Fisher's direction is marked by a tense and foreboding tone, supported by atmospheric cinematography that enhances the macabre and suspenseful mood. The film delves deeply into themes of madness, hubris, and the consequences of playing God, presenting a darker and more complex portrayal of the Frankenstein mythos.

Peter Cushing delivers a masterful performance, embodying a character whose brilliance is matched only by his cold-blooded determination, making "Frankenstein Must Be Destroyed" a standout entry in the Hammer horror canon and a chilling exploration of the darker sides of human ambition and scientific endeavor.