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The Blob (1958) Plot Summary & Timeline

The Blob (1958) movie poster

The Blob is a 1958 sci-fi and horror film directed by Irvin S. Yeaworth Jr. and Russell S. Doughten Jr., running 1 hour 26 minutes. This page retells the whole story in 670 words (about 3 minutes to read) and covers 15 key events in order, 5 characters, where and when it is set and 3 themes. Looking for the cast, ratings and where to stream it? See the movie page for The Blob.

to read the plot summary
3 min
key events in the timeline
15
characters profiled
5
themes explained
3
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The Blob (1958) movie poster
Released
Runtime
1h 26m
Genres
Sci-Fi, Horror
Original language
English
No spoilers

What Is The Blob About?

The premise of The Blob in 287 words, with nothing given away. The full story follows below.

In the quiet outskirts of a small Californian town, an unexpected meteorite shatters the night sky, leaving behind a mysterious, gelatinous residue that begins to spread with an unsettling speed. The film opens with a blend of 1950s‑era small‑town charm and a creeping, otherworldly dread, setting a tone that is part classic sci‑fi curiosity and part tense horror. Sun‑bleached streets and dimly lit diners become the backdrop for a story where the everyday collides with the inexplicable, and the ordinary concerns of teenagers quickly give way to a looming, invisible threat.

At the heart of the tale are Steve Andrews and his girlfriend Jane Martin, two resourceful teens whose bond is tested by the growing peril surrounding them. Their youthful optimism and determination contrast sharply with the town’s initial denial and skepticism, highlighting a generational clash between curiosity and complacency. Joined by Jane’s younger brother, Danny, the trio embodies the classic “outsider‑heroes” who must confront a menace that the adults around them either downplay or fail to understand. Their interactions are infused with a mix of light‑hearted banter and genuine concern, giving the film an intimate, character‑driven core amid the escalating tension.

As the strange ooze continues to spread, the town’s uneasy atmosphere draws the attention of a nearby military unit, promising a shift from local panic to organized response. The presence of the armed forces adds a layer of bureaucratic urgency that juxtaposes the teenagers’ grassroots initiative, hinting at larger consequences beyond the community’s borders. Through atmospheric lighting, a suspenseful score, and a steady build of unease, the movie invites viewers to wonder how far the unknown will travel before it forces everyone—young and old—to confront a threat that refuses to be contained by ordinary means.

Full plot

What Happens in The Blob?

The complete story of The Blob, from the first scene to the last, in 670 words (about 3 minutes). Spoilers throughout. Names in the text link to 1 cast member page.

Spoilers ahead

In a charming little town in Pennsylvania, Steve Andrews and his girlfriend Jane Martin enjoy a sweet moment at a remote lovers’ lane when they are suddenly interrupted by a meteorite crashing beyond the hill. Compelled by curiosity, Steve bravely decides to investigate, but it is the elderly resident Barney, played by Olin Howland, who stumbles upon the glowing rock first. His intrigue leads him to poke at the meteorite with a stick, which violently bursts open, releasing a bizarre gelatinous entity that latches onto his hand.

As Barney writhes in pain, a near miss with Steve’s car leads the young couple to rush him to Doctor Hallen’s office, portrayed by Earl Rowe. After administering anesthesia to Barney, the doctor assigns Steve and Jane a critical task: they must uncover the meteorite’s impact site and gather essential information. However, before they can complete their mission, Doctor Hallen faces a harrowing choice—amputate Barney’s arm or risk losing him entirely to the relentless, cell-like substance consuming him.

The mysterious Blob, as it comes to be known, continues its inexorable advance through the town, devouring its residents one by one. Following Barney’s disappearance, we witness the chaos as Kate, Doctor Hallen’s nurse, and then the doctor himself become victims of the growing menace. With each life the Blob claims, it expands and changes from a simple gelatinous mass to a menacing, larger, and more vibrant threat.

Steve and Jane return from their investigation just in time to witness the heartbreaking scene of Doctor Hallen attempting to escape through a window, only to be engulfed by the very creature he sought to evade. Frantically, the couple seeks help from the local police at the station, where Lieutenant Dave Barton and Sergeant Jim Bert dismiss their alarming claims as mere fabrications.

As night falls, Steve and Jane find themselves increasingly desperate, struggling to convince others of the lurking danger until they come across a mechanic who has already succumbed to the Blob’s hideous appetite. Realizing the severity of the threat, Steve gathers his friends and community members in an effort to spread the word about the monster that has infiltrated their town.

Despite facing skepticism and scorn, a turning point arises during a midnight screening of Daughter of Horror at the Colonial Theater, where Steve unexpectedly finds support in Tony, who shares his fears about the Blob’s rampant destruction. The night spirals into chaos as the monstrosity continues its relentless onslaught, leading Steve, Jane, and her younger brother Danny to a diner filled with terrified patrons.

In a nail-biting standoff, they, along with the diner’s staff, face the greed of the ever-hungry Blob, which has grown even larger after consuming countless victims. Dave takes control of the situation, advising everyone to seek safety in the cellar while strategizing with Sergeant Bert to electrocute the being by taking down a high-voltage power line. Although this tactic lacks the desired impact on the creature, it leads to a fire ablaze beneath its gelatinous form, creating an opportunity for the diner owner to fight back with a fire extinguisher.

As Steve notices the Blob reacting to the cold, he realizes it is sensitive to low temperatures. He conveys this crucial revelation to Dave, igniting hope for the captured diners. Armed with this knowledge, Steve’s friends, local firefighters, and police form a united front, mounting a daring rescue operation to produce a cache of carbon dioxide extinguishers from their high school, lead by Henry Martin, Jane’s father.

With a united effort, they finally drive the Blob away from the diner and manage to rescue the five survivors. The authorities then devise a plan to encase the now-frozen monster and airlift it to the Arctic, where the cold will theoretically halt its advance without killing it. As Dave contemplates the implications of this plan, the film concludes with a chilling uncertainty, as the words “The End” drift into the air transformed into a question mark, leaving the fate of the Blob—and perhaps the town—uncertain as the credits begin to roll.

Timeline

The Blob Timeline: Every Key Event in Order

15 key events in the order they happen, from “Meteorite Crash” to “Uncertain Fate”. 15 events name a place, across 8 locations.

  1. 1

    Meteorite Crash

    In a charming little town in Pennsylvania, Steve Andrews and his girlfriend Jane Martin enjoy a romantic moment when a meteorite crashes nearby. Their curiosity piqued, Steve decides to investigate the source of the disturbance beyond the hill.

    Where:Pennsylvania

  2. 2

    Barney Discovers the Meteorite

    The local elderly resident, Barney, encounters the glowing meteorite first. As he approaches it out of intrigue, he pokes at it with a stick, triggering a violent reaction that causes the meteorite to burst open and expose a strange gelatinous entity.

    Where:Lovers' lane

  3. 3

    Barney's Injury

    After the meteorite's explosive reaction, Barney finds the gelatinous creature latching onto his hand, causing him immense pain. In a frantic rush, Steve and Jane take Barney to Doctor Hallen for immediate medical attention.

    Where:Doctor Hallen's office

  4. 4

    Doctor Hallen's Dilemma

    Doctor Hallen faces a grave decision when he realizes the only way to save Barney might be to amputate his arm. The doctor assesses the situation while Steve and Jane are tasked with uncovering the meteorite's impact site to gather information.

    Where:Doctor Hallen's office

  5. 5

    The Blob's Rampage Begins

    The mysterious Blob begins to wreak havoc in the town, devouring residents one by one and growing in size. Barney's disappearance initiates widespread panic as Kate, a nurse, and Doctor Hallen himself fall victim to the Blob's insatiable hunger.

    Where:The town

  6. 6

    Doctor Hallen's Fate

    Steve and Jane return to witness a shocking scene at the doctor's office. Doctor Hallen attempts to escape through a window, but the relentless Blob overtakes him before he can get away, leaving the couple in disbelief.

    Where:Doctor Hallen's office

  7. 7

    Seeking Police Aid

    In desperation, Steve and Jane rush to report the looming danger at the local police station. Lieutenant Dave Barton and Sergeant Jim Bert dismiss their warnings, considering them mere fabrications born from fear.

    Where:Police station

  8. 8

    The Mechanic's Demise

    As night descends, Steve and Jane stumble upon the grim outcome of the Blob's attack: a mechanic who has already fallen prey to the gelatinous monster. This discovery solidifies their understanding of the danger they face.

    Where:Diner

  9. 9

    Midnight Screening

    During a midnight screening of *Daughter of Horror* at the Colonial Theater, Steve encounters Tony, who expresses similar fears about the Blob. This moment of solidarity energizes Steve and rekindles hope as chaos erupts outside.

    Where:Colonial Theater

  10. 10

    Diner Showdown

    Confronted by the Blob's overwhelming size and ferocity, Steve, Jane, and other diner patrons face a terrifying showdown with the ever-hungry creature. Lieutenant Dave takes charge, urging everyone to seek shelter as they devise a plan to combat the Blob.

    Where:The diner

Show the other 5 events of The Blob
  1. 11

    Failed Electrical Tactic

    In a desperate attempt to stop the Blob, the authorities try to electrocute it by dismantling a high-voltage power line. However, this plan backfires, leading to a fire igniting beneath the Blob, but it still threatens the diners inside.

    Where:The diner

  2. 12

    Cold Temperature Revelation

    Steve observes that the Blob reacts adversely to cold temperatures, sparking a glimmer of hope for the trapped diners. This pivotal realization leads him to rally his friends, firefighters, and police to formulate a rescue plan using carbon dioxide extinguishers.

    Where:The diner

  3. 13

    Rescue Operation

    With a group of friends and community members, Steve organizes a daring operation to retrieve carbon dioxide extinguishers from their high school. Their combined effort successfully drives the Blob away from the diner and saves the five survivors.

    Where:The diner

  4. 14

    Plan to Contain the Blob

    The authorities devise a strategy to encase the now-frozen Blob and transport it to the Arctic. This plan aims to neutralize the threat posed by the creature while ensuring that it remains contained, leaving the future uncertain.

    Where:The town

  5. 15

    Uncertain Fate

    As the film draws to a close, Dave reflects on the implications of their strategy against the Blob. The conclusion is hauntingly open-ended, leaving viewers to ponder the fate of the Blob and the town as the words 'The End' transform into a question mark.

    Where:The town

Characters

Who Are the Main Characters in The Blob?

5 characters, among them Steve Andrews, Jane Martin and Barney: who each one is and the part they play in the story. 2 of them link to the actor’s page.

  • SA

    Steve Andrews

    Steve is a brave and determined young man who becomes the reluctant hero of the story. He displays courage by investigating the strange happenings yet also faces the struggle of convincing others of the imminent danger. His character embodies the challenges of leadership and the resolve to protect loved ones.

    • 👦 Hero
    • 🚀 Courageous
  • JM

    Jane Martin

    Jane is Steve's supportive girlfriend who stands by him through the unfolding chaos. Her character adds emotional depth, showcasing the personal stakes at risk as she navigates the horror alongside her loved ones. Jane's resilience complements Steve's bravery, making them a formidable duo.

    • ❤️ Love
    • 🕊️ Supportive
  • Olin Howland as Barney in The Blob

    Barney

    Played by Olin Howland

    Barney represents the initial victim of the Blob, whose curiosity turns tragic when he encounters the cosmic horror. His character serves as a catalyst for the ensuing chaos, illustrating how a single moment of folly can impact an entire community and escalate a crisis.

    • 👴 Innocent
    • 🌑 Tragic
  • DH

    Doctor Hallen

    Played by Earl Rowe

    Doctor Hallen is the town’s physician who faces an agonizing decision to save Barney. His character embodies the moral dilemmas faced by those in positions of authority when confronted with unfathomable circumstances. His ultimate fate underscores the risks those in charge must bear.

    • ⚕️ Authority
    • 💔 Sacrifice
  • LD

    Lieutenant Dave Barton

    Lieutenant Dave is a local police officer who initially doubts the claims of the protagonists but eventually steps up to lead the community's efforts against the Blob. His character illustrates the journey from skepticism to action, revealing the complexities of leadership during crises.

    • 👮 Leadership
    • 👁️ Skeptical
Setting

Where and When Is The Blob Set?

The Blob is set in Pennsylvania. Here is why the place matters to the story.

When

The movie does not specify a particular time period, allowing it to resonate with audiences from various eras. However, the cultural references and the setting suggest a classic mid-20th century atmosphere that adds to its unique nostalgia.

Where

Pennsylvania

The movie takes place in a charming little town in Pennsylvania, known for its picturesque landscapes and peaceful, close-knit community. This serene backdrop becomes a chilling setting as it gets disrupted by the arrival of a mysterious entity, transforming the town into the battleground for survival.

  • 🏡 Town
  • 🌌 Nature
Themes

What Are the Themes of The Blob?

3 ideas the story keeps returning to, among them Survival, Community and Fear of the Unknown.

  1. 01

    Survival

    The core theme revolves around survival against an unseen predator that threatens to consume everything in its path. As the townsfolk face disbelief and chaos, the instinct to fight and protect one another emerges, showcasing resilience in the face of horror.

  2. 02

    Community

    The movie explores the theme of community as the residents come together to confront a common threat. From skeptical authorities to terrified patrons in a diner, the necessity for collaboration becomes evident, highlighting the strengths and vulnerabilities of communal bonds.

  3. 03

    Fear of the Unknown

    A significant theme is the fear of the unknown, represented by the amorphous, invading Blob. As the townspeople grapple with the bizarre entity, their escalating panic reveals how fear can distort reality and lead to drastic actions in a desperate search for safety.

Tone & mood

What Kind of Film Is The Blob?

Tense in tone, with fast pacing and a straightforward story, going by the plot summary.

Tone
Tense
Pacing
Fast
Story
Straightforward
Intensity
High
Ending
Ambiguous

A fast-paced and tense creature feature that induces anxiety as a seemingly unstoppable monster terrorizes a small town, creating escalating chaos and desperate survival efforts.

  • anxious
  • suspenseful
  • desperate
  • menacing
  • terrifying
  • chaotic
  • alien invasion
  • small town panic
  • survival
  • monster on the loose

Content notes: eaten alive, body horror, child endangerment.

Quiz

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FAQ

The Blob Plot Questions

5 quick answers about The Blob, taken from the plot summary, character guide and setting on this page and the film’s credits.

What is The Blob about?

In the quiet outskirts of a small Californian town, an unexpected meteorite shatters the night sky, leaving behind a mysterious, gelatinous residue that begins to spread with an unsettling speed.

Read the full plot summary

When and where does The Blob take place?

The Blob is set in Pennsylvania. The movie does not specify a particular time period, allowing it to resonate with audiences from various eras. However, the cultural references and the setting suggest a classic mid-20th century atmosphere that adds to…

The setting explained

Who are the main characters in The Blob?

The story follows Steve Andrews, Jane Martin, Barney (played by Olin Howland) and Doctor Hallen (played by Earl Rowe); the character guide covers 5 characters in all.

All the characters

What are the main themes of The Blob?

The summary picks out 3 themes: Survival, Community and Fear of the Unknown.

The themes explained

Who directed The Blob?

The Blob (1958) was directed by Irvin S. Yeaworth Jr. and Russell S. Doughten Jr. and runs 1 hour 26 minutes.

Irvin S. Yeaworth Jr.’s films

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