The Spiral Staircase (1975) Timeline Explained – Every Event in Order

Helen became mute after witnessing the deaths of her husband and daughter in a devastating house fire. The trauma of this experience left her unable to speak, which is why she communicates primarily through writing and gestures throughout the film.

Foreshadowing: Her mutism is established early when Dr. Rawley notes her fragile emotional state.

• helen mallory
• mute
• trauma
• house fire
• psychological

Joe Sherman, Helen's uncle and a respected psychiatrist, is revealed to be the serial killer. He has been systematically hunting young women with physical disabilities, using his position of trust to get close to his victims. His motive appears tied to his professional interest in disabilities, though the film keeps this connection disturbingly implicit.

Foreshadowing: Joe's early instruction to repair the generator and his inspection of the cellar establish his knowledge of the mansion's layout.

• joe sherman
• killer
• psychiatrist
• reveal
• uncle

Joe kills Blanche because she discovers his identity as the killer and confronts him with this knowledge. As his secretary and lover, she had access to him and likely learned something that exposed his crimes, forcing him to eliminate her to maintain his secret.

Foreshadowing: Blanche's revelation to Joe about 'the truth' precedes her murder.

• blanche
• murdered
• joe sherman
• killed

Helen survives because Mrs. Sherman, Joe's own mother, shoots him twice from behind as he attempts to strangle Helen in the cellar. This act of intergenerational justice stops Joe and allows Helen to escape with her life.

Foreshadowing: Mrs. Sherman earlier required insulin but remained aware enough to protect her granddaughter.

• helen saved
• mrs sherman
• joe's mother
• shooting

Helen regains her voice as a result of overcoming her psychological trauma. In the climactic moment when she calls Dr. Rawley for help while fighting for her life, the intense emotional experience breaks through her years of silence, allowing her to speak for the first time since the fire.

Foreshadowing: Her silence has been consistently linked to the fire trauma throughout the film.

• helen speaks
• voice returns
• trauma recovery
• breakthrough

Lieutenant Fields arrives at the mansion to deliver insulin for Mrs. Sherman, who is diabetic and requires the medication. He drops off the insulin and departs, not realizing the danger unfolding inside, which creates a brief moment where help is so close yet unreachable.

Foreshadowing: Mrs. Sherman's earlier diabetic crisis establishes her need for insulin.

• lieutenant fields
• insulin delivery
• mrs sherman

After disposing of Oates's body, Steven is locked in the cellar by Helen, who suspects him of being the killer. He remains trapped there until the final confrontation, when he finally manages to free himself and comes to aid his mother after Joe is shot.

Foreshadowing: Helen's growing suspicion of Steven builds after the murders of Oates and Blanche.

• steven
• cellar
• locked in
• trapped

Joe instructs Oates to repair the generator in case the power fails, which becomes crucial when the storm knocks out electricity. The resulting darkness allows Joe to move through the mansion undetected and execute his kills, making the generator preparation a deliberate setup for the murders.

Foreshadowing: Joe's knowledge of the generator's location is shown when he inspects it alone.

• generator
• darkness
• power outage
• blackout

As a psychiatrist who studies disabilities professionally, Joe selects victims who have physical impairments. His twisted fascination with vulnerability and disability appears to be the driving force behind his victim selection, though the film leaves his exact psychological motive deliberately unsettling.

Foreshadowing: The police note that all five victims shared physical disabilities.

• disabilities
• victims
• targeting
• pattern

Oates is strangled to death at the mansion's gate after he steps outside to console Helen. His murder demonstrates that the killer's reach extends beyond the house itself and that anyone who tries to help Helen is in grave danger.

Foreshadowing: Oates's act of kindness toward Helen positions him as a target.

• oates
• murdered
• strangled
• handyman

During the storm, Lieutenant Fields and another officer encounter a mysterious man on the mansion grounds. When the man tries to escape, Fields shoots him, believing they've caught the killer. The twist reveals this was an innocent person, creating a false sense of security while the real killer remains inside.

Foreshadowing: The scene establishes that the police are actively patrolling the property.

• intruder
• police shooting
• wrong person
• mistaken identity

Helen locks Steven in the cellar because she suspects he may be the killer after learning about the murders of both Oates and Blanche. Her fear and mistrust lead her to trap him, though this ultimately proves misguided as Joe is the true culprit.

Foreshadowing: Steven's involvement with Blanche and his disposal of Oates's body make him appear suspicious.

• steven
• suspicious
• locked
• cellar