What Is Crack in the World About?
The premise of Crack in the World in 359 words, with nothing given away. The full story follows below.
In the stark expanses of Tanganyika, a multinational scientific consortium has carved an underground outpost that feels more like a cathedral of ambition than a laboratory. Their goal is audacious: drill farther beneath the Earth’s crust than any before them and tap the planet’s own geothermal furnace for limitless power. The remote setting, the hum of massive equipment, and the weight of global expectation create a tense, almost reverential atmosphere, where every reverberation of the deep earth feels like a promise—or a warning.
At the heart of the project is Dr. Steven Sorenson, a visionary whose brilliance is matched only by the private battle he fights against a terminal illness. Sorenson’s drive is both scientific and personal; he sees the experiment as a chance to leave a lasting imprint on humanity while wrestling with the urgency of his own limited time. Opposite him stands Dr. Ted Rampion, the chief geologist whose caution stems from years of watching the subtle scars left by humanity’s past nuclear experiments. Their contrasting philosophies—one of daring optimism, the other of measured restraint—fuel a dynamic that is as much about intellectual debate as it is about survival.
The plan they pursue is as bold as it is perilous: lower a thermonuclear device to the deepest point of the borehole, hoping the blast will pierce an impenetrable mantle and unleash a new source of clean energy. The very notion of detonating a bomb miles beneath the surface casts a long, uneasy shadow over the team, hinting at the fragile line between breakthrough and disaster. The environment itself seems to hold its breath, the earth’s sigh audible in the tremors that echo through the tunnels.
When the explosion ignites a fissure that begins to race along a ancient fault line, the stakes skyrocket from scientific triumph to planetary survival. Sorenson, his steadfast wife Maggie Sorenson, and the rest of the crew find themselves caught in a relentless race against a growing crack that threatens to split the world in half. The film balances breathtaking visual spectacle with a cerebral, existential dread, asking whether humanity’s reach can ever truly be contained within the limits of its own creation.
What Happens in Crack in the World?
The complete story of Crack in the World, from the first scene to the last, in 356 words (about 2 minutes). Spoilers throughout.
Spoilers ahead
An international consortium of scientists, operating as Project Inner Space in Tanganyika, Africa, is driven by a bold goal: tap the Earth’s geothermal energy by drilling a very deep hole that reaches toward the planet’s core. When their drill meets an exceptionally dense barrier, the team resolves to detonate an atomic device at the bottom in a race against time to punch through.
The project’s leader, Dr. Stephen Sorenson, [Dana Andrews], who is secretly dying of cancer, believes the device will burn its way through the barrier and unlock the energy below. But the team’s chief geologist, Dr. Ted Rampion, [Kieron Moore], argues that decades of underground nuclear testing have weakened the lower crust, and that detonating there could unleash a colossal fracture that might threaten the entire planet.
Their experiment goes forward, and Rampion’s fears are borne out as the crust splits into a vast crack that races along a fault, triggering earthquakes and tsunamis along its path. Rampion warns a global committee that the crack could extend beyond the fault, potentially encircling the world and pulling the landmasses apart, forcing oceans to boil into steam under immense pressure and threatening to tear Earth itself asunder.
Meanwhile, Sorenson uncovers a hidden reservoir of hydrogen beneath the surface, which turns the modest blast into a massive thermonuclear explosion—millions of times more powerful than intended. In a desperate bid to halt the advance, another device is lowered into the magma chamber of an island volcano that sits in the crack’s path, but this intervention only redirects the fracture rather than stopping it. As the fissure nears the test site, a monumental portion of the planet outlined by the crack appears doomed to be hurled into space.
Sorenson remains at the underground control center to record the cataclysm, even as his wife Maggie Sorenson, [Janette Scott], pleads with him to evacuate along with the rest of the staff. The two barely escape the site in time to witness a spectacular, perilous event—the fiery birth of a second moon. That moon’s emergence alters the trajectory of the crack and offers a fragile chance for Earth to endure the crisis.
Crack in the World Timeline: Every Key Event in Order
12 key events in the order they happen, from “Project Inner Space launches in Tanganyika” to “Aftermath and cautionary reflection”. 12 events name a place, across 11 locations.
- 1
Project Inner Space launches in Tanganyika
An international team begins drilling a deep hole toward the Earth's core in Tanganyika, Africa, hoping to tap geothermal energy. They face a nearly impenetrable barrier of dense material that resists penetration. The plan becomes to detonate an atomic device at the bottom to burn through and reach the magma beneath.
Where:Tanganyika, Africa
- 2
Leadership clash over detonating the device
Dr. Stephen Sorenson, secretly dying of cancer, leads the project and argues for detonating the device to break the barrier. His rival, Dr. Ted Rampion, contends the plan is reckless and dangerous. The clash between ambition and caution sets the tone for the mission's perilous path.
Where:Drilling site and control rooms
- 3
Rampion warns about crust weakness
Rampion presents his risk assessment: decades of underground testing may have weakened the crust, so the blast could trigger a planet-spanning crack. He warns that such a fracture could threaten Earth's stability far beyond the immediate project. The proposal proceeds amid rising global scrutiny.
Where:Briefing room
- 4
Detonation at the bottom of the borehole
At the bottom of the borehole, the atomic device is detonated. The blast immediately interacts with an underground hydrogen pocket, turning the explosion into a colossal thermonuclear event. The dense barrier shatters and a crack begins to race through the crust.
Where:Bottom of borehole
- 5
Hydrogen reservoir amplifies the blast
Sorenson discovers a vast underground hydrogen reservoir that amplifies the explosion, making it far more powerful than planned. The amplified blast drives a rapidly expanding crack along the planet's fault lines. The team realizes the catastrophe could extend far beyond their drilling site.
Where:Underground chamber
- 6
Global seismic upheaval begins
Seismic shocks ripple across continents as the crack advances, triggering tsunamis that devastate coastal regions. Governments scramble to respond while infrastructure buckles under the seismic pressure. The world recognizes that the disaster is unfolding on a planetary scale.
Where:Global
- 7
Warning about possible encirclement of Earth
Rampion warns a global leadership committee that the crack could encircle the Earth, potentially causing the landmasses to split and oceans to be sucked inward, generating dangerous steam pressures. The warning heightens political urgency and fear as leaders debate containment. The mission's fate now hinges on whether the disaster can still be halted.
Where:Global leadership committee
- 8
Second device aimed to redirect the fracture
A second atomic device is lowered into the magma chamber of an island volcano along the crack's path to alter its trajectory. The blast redirects the fracture rather than stopping it, buying time but not ending the threat. Vivid red glow and shockwaves mark the detonation as the crack shifts direction.
Where:Island volcano along the crack's route
- 9
Crack returns toward its origin
As the crack nears its origin, a massive segment of the planet along the fault line seems ready to be ripped away. Sorenson remains in the underground control center to monitor and record the unfolding event. The team braces for the worst as time runs out.
Where:Underground test site
- 10
Escape and witness the second moon
Maggie Sorenson, Sorenson's wife, and Rampion barely escape the site with others, then watch from a distance as the crack culminates in the fiery birth of a second moon. The cosmic event alters the disaster's trajectory and eases the immediate threat. Earth survives to endure the aftermath.
Where:Safe distance from site
- 11
The crack halts and Earth appears saved
The fiery birth of the second moon interrupts the catastrophe, and the crack stops near its origin, sparing Earth from total destruction. Sorenson remains at the underground center to record the historic moment. The team breathes a cautious sigh of relief as the planet stabilizes.
Where:Underground facility
- 12
Aftermath and cautionary reflection
In the wake of the disaster, humanity surveys the damage and contemplates the dangers of meddling with the planet's interior. Survivors begin rebuilding while reassessing the ethical limits of scientific power. The story closes on a note of caution about responsibility and the hidden depths beneath the surface.
Where:Global
Who Are the Main Characters in Crack in the World?
10 characters, among them Dr. Stephen Sorenson (Dana Andrews), Dr. Ted Rampion (Kieron Moore) and Sir Charles Eggerston (Alexander Knox): who each one is and the part they play in the story. Every profile links to the actor’s page.
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Dr. Stephen Sorenson (Dana Andrews)
Played by Dana Andrews
Leader of the project, secretly dying of cancer, believes the atomic device will burn through the barrier to reach the core. He remains at the underground control center to monitor and record the events, facing both scientific and personal pressures. His resolve drives the action and moral gravity of the narrative.
- 🧪 Scientist
- 🎗️ Illness
- 🤝 Leadership
-
Dr. Ted Rampion (Kieron Moore)
Played by Kieron Moore
Chief geologist who argues the lower crust has been weakened by decades of underground tests and that detonation could trigger a world-changing crack. He is cautious, analytical, and ultimately proven right about the dangers. His warnings create the central tension between risk and knowledge.
- 🧭 Geologist
- ⚠️ Risk
- 🌋 Geoscience
-
Sir Charles Eggerston (Alexander Knox)
Played by Alexander Knox
A senior project administrator representing international interests, trying to balance scientific ambition with political and global repercussions. He mediates between scientists, diplomats, and leaders as the crisis unfolds. His role emphasizes the cross-border stakes of the endeavor.
- 🗺️ Authority
- 💼 Politics
- 🤝 Leadership
- DM
Dr. Maggie Sorenson (Janette Scott)
Played by Janette Scott
Sorenson's wife, part of the high-pressure environment and emotionally invested in the fate of the team. She pleads for caution and evacuation, highlighting the human cost of the crisis. Her perspective adds a personal dimension to the scientific pursuit.
- 💖 Family
- 👩⚕️ Doctor
- 🧭 Support
- JM
John Masefield (Peter Damon)
Played by Peter Damon
A project staff member involved in operational aspects of the mission, contributing to the coordination and execution of the dangerous experiment. He represents the bureaucratic and practical side of the operation.
- 🧭 Bureaucrat
- 🧪 Scientist
- DR
Dr. Reynolds (John Karlsen)
Played by John Karlsen
Senior scientist aiding the team, providing expertise and participating in the decision-making process under extreme pressure. His involvement underscores the collaborative nature of the project.
- 🧪 Scientist
- 🧭 Mentor
- S(
Simpson (Todd Martin)
Played by Todd Martin
A technical staff member whose routine tasks contribute to the tense atmosphere of the operation. He represents the many behind-the-scenes workers in a high-stakes scenario.
- 👷 Technician
- 🧰 Support
- A(
Angela (Sydna Scott)
Played by Sydna Scott
A project staff member whose presence adds to the human dimension of the crisis. She participates in the escalation of the tension as events unfold.
- 👩💼 Staff
- 🧭 Support
- IA
Indian Ambassador (Ben Tatar)
Played by Ben Tatar
Diplomatic liaison representing global governance in the crisis, illustrating the international political stakes of the project.
- 🤝 Diplomacy
- 🌍 International relations
- EC
Emilio Carrere
Played by Emilio Carrere
A supporting member of the project staff; the film does not detail his specific duties, but his presence contributes to the tense operational atmosphere.
- 🎭 Supporting
- 🧩 Minor role
Where and When Is Crack in the World Set?
Crack in the World is set in Tanganyika and Africa. Here is why the place matters to the story.
Where
Tanganyika, Africa
An international drilling operation sits in Tanganyika, Africa, pushing a deep hole toward the Earth's core to tap geothermal energy. The remote, harsh environment hosts a high-stakes scientific facility where engineers monitor a volatile underground experiment. This setting grounds the drama in a real-world landscape of risk, secrecy, and global interest.
- 🗺️ Tanganyika drill site
- ⚡ Geothermal research
- 🧭 International project
What Are the Themes of Crack in the World?
3 ideas the story keeps returning to, among them Global Threat, Scientific Ethics and Nuclear Fear.
-
01
Global Threat
The project is framed as a mission with global consequences, turning a technical drilling operation into a test of civilization's limits. Rampion's warning that the crust has been weakened by decades of tests underscores the precarious balance between scientific ambition and planetary safety. The threat of a runaway crack that could encircle the globe and pull oceans into steam heightens existential stakes for leaders and scientists alike. The narrative builds toward a crisis where human decisions could literally reshape Earth.
-
02
Scientific Ethics
Sorenson's cancer adds personal urgency to the ethic debate, blurring science with human mortality. Rampion's cautions clash with the desire to solve a resource problem, forcing characters to weigh immediate gains against long-term risks. The crisis method—the use of weapons and experiments—forces a moral reckoning about experimentation without full understanding. Ultimately, the crew must confront whether certain risks justify their pursuit of knowledge.
-
03
Nuclear Fear
The unexpected thermonuclear amplification from underground hydrogen alters the science and forces a new approach. The duel between two atomic devices—one intended to stop the crack, one inadvertently redirecting its path—highlights the unpredictability of nuclear forces. The film culminates in a dramatic escape and the birth of a second moon, a fantastical image that signals Earth's near brush with destruction. Despite the peril, Earth survives, suggesting resilience but at a cost.
What Kind of Film Is Crack in the World?
Tense in tone, with fast pacing and a straightforward story, going by the plot summary.
- Tone
- Tense
- Pacing
- Fast
- Story
- Straightforward
- Intensity
- High
- Ending
- Bittersweet
A tense and fast-paced disaster film that plunges the audience into a desperate race against time to prevent a planet-splitting catastrophe, filled with high-stakes science and personal sacrifice.
- urgent
- anxious
- catastrophic
- grim
- desperate
- scientifically speculative
- dangerous technology
- scientific hubris
- global disaster
- race against time
Content notes: catastrophic destruction, terminal illness.
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