Strange Behavior

Strange Behavior

Year: 1981

Runtime: 99 mins

Language: English

Director: Michael Laughlin

HorrorScience FictionMysteryHorror the undead and monster classicsIntense violence and sexual transgression

The small Illinois town’s population has been dwindling, with bodies disappearing six feet underground. When a series of teenage murders erupts, the police chief discovers a link to secret scientific experiments at the local university. He races against time to halt the deadly project before his own son becomes a victim.

Warning: spoilers below!

Haven’t seen Strange Behavior yet? This summary contains major spoilers. Bookmark the page, watch the movie, and come back for the full breakdown. If you're ready, scroll on and relive the story!

Strange Behavior (1981) – Full Plot Summary & Ending Explained

Read the complete plot breakdown of Strange Behavior (1981), including all key story events, major twists, and the ending explained in detail. Discover what really happened—and what it all means.

Bryan Morgan, Bill Condon the mayor’s son in Galesburg, Illinois, is brutally murdered in his own home, and his body is later found stuffed and posed as a scarecrow, a grotesque image that unsettles the town and prompts a relentless investigation. Local John Brady, Michael Murphy, a seasoned police investigator, dives into the case, tracing a trail of violence that seems to echo a disturbing pattern. As the case unfolds, Pete Brady, Dan Shor, a high school senior, sits in on a course at Galesburg University with his friend Oliver Myerhoff and becomes entangled in a web of experiments, loyalties, and hidden motives.

During the course, Gwen Parkinson, Fiona Lewis the professor of the class, screens a lecture by her late mentor, Dr. Le Sange, whose influence reaches back to Pete’s mother, Catherine, who once worked for him. After the lecture, Pete volunteers to become one of Gwen’s test subjects, hoping the stipend will pad his college applications and open doors for his future. The narrative then shifts to a lively house party, where the mood shifts from carefree to terrifying: Waldo is stabbed to death outside by a masked assailant, and Waldo’s girlfriend Lucy, Elizabeth Cheshire, is attacked and nearly drowns in the pool. Pete and others rush to rescue her, and the masked figure flees, unmasked in the distance as Oliver, the very friend they had been with earlier that night.

John Brady questions Oliver, who admits he cannot recall the party’s events, claiming he was drunk. The investigation deepens as medical examiners note Waldo’s corpse bears a bizarre surgical incision near the eye, suggesting that two different assailants are responsible for the murders of Waldo and Bryan. Meanwhile, Pete returns to Gwen’s laboratory, a sprawling facility that conducts both human and animal experiments. Gwen subjects Pete to a mind-bending session: he swallows a pill, repeats a string of words, and is then dismissed. Pete begins a tentative romance with Caroline, a college student who works at the lab’s front desk, and what starts as a practical arrangement grows into something warmer and more complicated. Caroline, Dey Young, becomes a confidant as the body count rises.

The following day, a woman reports her son Timothy, Neil McLachlan, being dismembered in his bathroom by an unknown young woman; the distraught mother calls the police before being stabbed herself, and she manages to convey a few details to her friend Mildred before meeting a brutal end. The investigation pressures Gwen, and John suspects that a female subject from Gwen’s program might be involved. He confronts Gwen at the lab, unaware that Pete is in one of the test rooms, restrained in a chair. After John leaves, Gwen resumes the session and injects Pete with another substance, pushing him toward her control.

Back at the home front, Pete joins Caroline for dinner, but begins to deteriorate, vomiting blood and growing dangerously ill. John talks with his girlfriend, Barbara Moorehead, Louise Fletcher, about the murders, piecing together that each victim is the son of a man who once collaborated with John to expose Le Sange’s unethical experiments, and he comes to fear that Le Sange might still be alive and seeking revenge. Barbara follows John to the cemetery, where he breaks into Le Sange’s crypt and finds only two skeletonized lower legs—an ominous sign that their target may be on the loose.

John and Barbara return home to find a dazed Pete and Caroline waiting. A shotgun in hand, John heads toward the university, while Barbara recounts how Pete’s mother, Catherine, behaved oddly during her employment under Le Sange, and how her death remains unexplained. Pete and Caroline decide to tail John to the campus, where a chilling scene unfolds: Pete enters a chamber where John is communicating with Gwen via a small screen. Gwen’s mind-control methods enthrall Pete, who is ordered to seize his father’s gun. A legless, wheelchair-bound elderly man—revealed to be Le Sange in disguise—enters and proclaims a grand, if warped, philosophy of control and order. In a fraught confrontation, Le Sange instructs Pete to slash his wrists, and then to stab his own father to death. Pete, driven to a breaking point, declares that he “is his father” as the truth about Catherine’s affair with Le Sange comes to light, revealing that John is not Pete’s biological father. In a final, tense moment, the police intervene and Gwen is arrested.

In the aftermath, with the sinister apparatus dismantled, life begins to heal. A recovered Pete, standing on the threshold of adulthood, attends his father’s wedding to Barbara, accompanied by Caroline, signaling a fragile but hopeful possibility of normalcy returning to a town scarred by manipulation, betrayal, and fear.

Last Updated: October 09, 2025 at 14:57

Mobile App Preview

Coming soon on iOS and Android

The Plot Explained Mobile App

From blockbusters to hidden gems — dive into movie stories anytime, anywhere. Save your favorites, discover plots faster, and never miss a twist again.

Sign up to be the first to know when we launch. Your email stays private — always.

Unlock the Full Story of Strange Behavior

Don't stop at just watching — explore Strange Behavior in full detail. From the complete plot summary and scene-by-scene timeline to character breakdowns, thematic analysis, and a deep dive into the ending — every page helps you truly understand what Strange Behavior is all about. Plus, discover what's next after the movie.

Strange Behavior Timeline

Track the full timeline of Strange Behavior with every major event arranged chronologically. Perfect for decoding non-linear storytelling, flashbacks, or parallel narratives with a clear scene-by-scene breakdown.

Strange Behavior Timeline

Characters, Settings & Themes in Strange Behavior

Discover the characters, locations, and core themes that shape Strange Behavior. Get insights into symbolic elements, setting significance, and deeper narrative meaning — ideal for thematic analysis and movie breakdowns.

Characters, Settings & Themes in Strange Behavior

More About Strange Behavior

Visit What's After the Movie to explore more about Strange Behavior: box office results, cast and crew info, production details, post-credit scenes, and external links — all in one place for movie fans and researchers.

More About Strange Behavior