He Knows You’re Alone

Amy is a bride-to-be whose engagement marks the target of a relentless stalker. She is resourceful and increasingly anxious as the danger escalates, driving her to seek safety and confront the killer. Her perseverance under threat anchors the story’s emotional core.

Ray is the unseen killer who stalks Amy across multiple locations, using abrupt violence to eliminate witnesses. He is calculating, elusive, and capable of brutal acts in crowded public spaces. His presence sustains the film’s dangerous, claustrophobic atmosphere.

Marvin is Amy's ex-boyfriend who reappears in the story, adding tension to the love triangle around Amy's wedding. He becomes a potential ally or complication as the danger grows.

Nancy is Amy's friend who participates in the pre-wedding festivities and becomes a target, illustrating how the killer affects those closest to the bride. She ultimately falls victim to Ray.

Joyce is Amy's confidante who has an affair with the philosophy professor and becomes entangled in the danger surrounding the wedding night. She is one of the victims the killer leaves in his trail.

Carl is the philosophy professor involved in Joyce's affair; his discovery of violence leads to his demise at the killer's hands. He embodies intellectual confidence that is undone by the killer's brutality.

Phil is Amy's fiancé whose relationship with Amy is strained by the stalker’s menace, culminating in a dramatic resolution.

Diana is Amy’s younger sister who is under the care of Amy during the wedding period, adding personal stakes to the danger.

Detective Daley investigates the string of murders, coordinating with his partner to track the killer through the crime scenes.

Detective Gamble is Daley’s partner, contributing to the investigation and pursuing leads that connect the murders.

Ruthie is a friend who appears during the pre-wedding events and witnesses the unfolding peril, acting as part of the social circle surrounding Amy.

Ralph the Tailor provides a minor but pivotal encounter that ties into the killer’s urban stalking through the clothing shop and neighborhoods.

Elliot is a university student who befriends Amy during a jog and later accompanies her through the park, serving as a potential ally and witness in the investigation.