Dr. Jekyll & Sister Hyde (1971) Timeline Explained – Every Event in Order

Jekyll believes that women live longer than men and possess stronger biological defenses. After his colleague Professor Robertson mocks him for taking too long to find a cure, Jekyll becomes obsessed with creating an elixir of life. He harvests female hormones from cadavers supplied by the criminals Burke and Hare, reasoning that these hormones could unlock longevity by manipulating life chemistry.

• female hormones
• cadavers
• elixir of life
• burke and hare
• immortality serum

Jekyll compounds the female hormones into a serum and drinks it, triggering a dramatic physical transformation. His male body shifts into that of a woman, creating his female alter ego Mrs. Hyde (played by Martine Beswick). Initially, the transformation requires the serum to occur, but later Jekyll discovers he can transform through willpower alone.

• transformation
• serum
• mrs hyde
• gender swap
• alter ego

Each transformation requires more female hormones to maintain, creating a dangerous dependence. As Hyde grows bolder, she asserts control and manipulates events around the apartment. The more Jekyll uses the serum, the more his female persona pushes aside his rational male self, eventually gaining control even without the serum.

Foreshadowing: The Hyde persona begins pushing Jekyll's will aside shortly after her first appearance.

• dominance
• personality split
• willpower
• serum dependence
• hyde takes control

When Burke and Hare are exposed and eliminated by a mob, Jekyll loses his supply of cadaveric hormones. Desperate to continue his experiments, he takes matters into his own hands and commits the murders attributed to Jack the Ripper. Hyde relishes these killings, gaining strength and control through the carnage.

• jack the ripper
• murders
• london
• whitechapel
• serial killer

Mrs. Hyde seduces and then kills Professor Robertson when he presses for answers about the killings. Robertson had mocked Jekyll's slow progress earlier in the film, and his insistence on investigating the murders threatens to expose Jekyll's dual identity. Hyde eliminates him to protect the secret and satisfy her darker impulses.

• professor robertson
• murder
• seduction
• elimination
• threat exposure

Hyde decides that Susan's blood will help her seize complete control, stalking the innocent young woman through dark London streets. Jekyll's willpower barely prevents him from killing Susan during their confrontation, but the threat to her life becomes the focal point of the final struggle between the two personalities.

Foreshadowing: Howard is drawn to the Hyde persona while Susan's affection becomes entangled with fear.

• susan spencer
• stalking
• threat
• london streets
• hyde target

Jekyll plans to take Susan to the opera hoping for a normal evening, but when he dresses, he unknowingly puts on Hyde's gown instead of his own clothes. This moment reveals that he can no longer rely on the serum to transform, his willpower alone now triggers the change. Susan is heartbroken when he fails to take her to the show.

Foreshadowing: Hyde's personality has been steadily pushing Jekyll's will aside throughout the story.

• opera
• transformation
• willpower
• wardrobe
• serum failure

During a desperate escape from the police, Jekyll climbs along the exterior of a building but cannot separate himself from the Hyde force within. He transforms at the last moment and plummets to his death as an amalgamation of both male and female forms. The ending symbolizes that he could never truly escape his dual nature, the two identities finally merged in death.

• death
• fusion
• fall
• final transformation
• identity merge

Burke and Hare supply Jekyll with cadavers for his hormone extraction, but their criminal activities are eventually exposed. A mob lynches Burke, and Hare is blinded by lime, a brutal turn that eliminates Jekyll's suppliers and drives him to commit the Ripper murders himself to continue his experiments.

• burke
• hare
• lynched
• blinded
• criminal downfall

Hyde stalks Whitechapel's dark alleys hunting young women to sustain Jekyll's research. The murders provide the hormones needed to maintain the transformation and keep Hyde alive. As Hyde grows stronger, she comes to relish the killings, gaining pleasure from the chaos she helps unleash.

Foreshadowing: The serum's dependence on continuous hormone supply forces Jekyll into a grim pattern of murder.

• whitechapel
• hunting
• women victims
• hormone supply
• killings