science

The Black Phone

The Black Phone is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand The Black Phone rather than just read about it. In short: The Black Phone is a 2021 American supernatural horror film directed by Scott Derrickson from a screenplay he wrote with C. Robert Cargill, based on the 2004 short story by Joe Hill.

Key takeaways

The Black Phone belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect The Black Phone to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of The Black Phone from memory before moving on to harder problems.

Reference excerpt

The Black Phone is a 2021 American supernatural horror film directed by Scott Derrickson from a screenplay he wrote with C. Robert Cargill, based on the 2004 short story by Joe Hill. It is the first installment in the Black Phone franchise. It stars Mason Thames as Finney, a teenage boy abducted by a serial child killer known colloquially as the Grabber (Ethan Hawke). When Finney encounters a mystical black rotary phone in captivity, he uses it to plot his escape by communicating with the ghosts of the Grabber's slain victims. Madeleine McGraw, Jeremy Davies, and James Ransone also feature in the principal cast. Derrickson and Cargill produced The Black Phone in association with Blumhouse Productions CEO Jason Blum. Universal Pictures oversaw the film's commercial distribution, and funding was sourced through a pact with Blumhouse and tax subsidies from the North Carolina state government. The idea of The Black Phone arose from Derrickson and Cargill's adaptation of the eponymous short story by Hill, found in 20th Century Ghosts. Derrickson struggled to produce additional ideas that supplemented the short story, shifting his attention to other filmmaking endeavors. The film remained dormant until he resigned from Doctor Strange in the Multiverse of Madness (2022) over creative differences. Derrickson used his childhood experiences in suburban Denver, Colorado, to develop The Black Phone story. Principal photography began in February 2021 on a $16–18 million budget, and wrapped the following month. Shooting took place on sets and on location in Wilmington, North Carolina. Mark Korven composed the film's score, which drew on modern and vintage synthesizer sounds. The Black Phone premiered at Fantastic Fest on September 25, 2021, and opened in US theaters after several delays on June 24, 2022. It was a box office success, grossing $161.4 million globally. The film received positive reviews from critics, who praised its performances but were divided on its concept. The success of The Black Phone spawned the titular franchise, which includes a canonical short film titled "Dreamkill" as part of the anthology film V/H/S/85 (2023), and a sequel titled Black Phone 2 (2025).

Plot In 1978, a local serial child abductor and murderer, known only as "The Grabber", prowls the streets of a suburb in North Denver, Colorado. Finney Blake and his younger sister, Gwen, live in the area with their abusive, alcoholic father, Terrence, whose wife died by suicide after having a series of disturbing psychic dreams. Finney is frequently bullied and harassed at school, but his friend and classmate, Robin, fends off the bullies. Having inherited her mother's ability, Gwen dreams about the Grabber's abduction of Bruce, a boy Finney knew from Little League. Police detectives Wright and Miller interview Gwen at school, believing she may know the Grabber. When Terrence learns about the questioning, he beats Gwen. Soon afterward, the Grabber abducts Robin and then Finney. Finney awakens in a soundproofed basement with a disconnected black rotary dial telephone on one wall. It begins to ring on its own at times; Finney hears only static when he first answers it but then hears Bruce's voice telling him about a floor tile he can remove to dig an escape tunnel. Finney starts to dig, but the house's foundations are too deep for him to go beneath them. The Grabber brings Finney a meal and leaves the basement door unlocked. As Finney is about to sneak out, he gets a call from Billy, another past victim. Billy warns Finney that the Grabber is waiting at the top of the basement stairs to beat him with a belt until he passes out if he tries to leave, as part of a cruel game. At Billy's suggestion, Finney uses a hidden cable to climb up to the basement window; however, his weight pulls out the grate covering the pane, leaving him with no way to reach it again. As Gwen confides to Terrence about her dreams of Finney's abduction, Wright and Miller question an eccentric man named Max, who stays in the area with his brother and has shown great interest in the Grabber's crimes. Unbeknownst to him, Finney is being held in Max's basement, and the Grabber is actually his brother. Finney receives a call from Griffin, a third victim, who gives him the combination to the lock securing the house's front door and tells him that the Grabber has fallen asleep. He sneaks out and unlocks the door, but the Grabber quickly recaptures Finney after his dog, Samson, barks to wake him. A fourth victim, a juvenile delinquent named Vance, calls to tell Finney he can break through a wall and into a freezer in the adjacent room. Finney does so but finds the freezer door locked. As Finney despairs over his fate, he receives one last call from Robin, who urges him to stand up for himself and fight back by packing the phone receiver with dirt to use as a bludgeon. After seeing the Grabber's house in a vision, Gwen calls Wright and Miller to give them the address. The police rush to the house and find the bodies of the Grabber's victims buried in the basement. Meanwhile, Max realizes Finney is being held in the basement and rushes to free him, but the Grabber kills him with an axe. Upset that he had to kill his brother, the Grabber then attacks Finney, having decided to end his game. Finney uses the byproducts from his previous escape attempts to trap the Grabber in a pit he has dug, beats him with the receiver, and breaks his neck with the phone cord as his past victims taunt him. Throwing a steak from the freezer to Samson as a distraction, Finney leaves the house, which turns out to be across the street from the one the police have raided. Terrence tearfully begs Finney and Gwen to forgive his earlier treatment of them. Sometime later, now viewed as a hero at school, a newly confident Finney sits next to his crush in class and says she can call him Finn.

Cast

Production

Development

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with The Black Phone

Start with the simplest possible case. Write down what The Black Phone claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to The Black Phone before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about The Black Phone ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of The Black Phone

In research: The Black Phone appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses The Black Phone in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: The Black Phone is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2020s ghost films, 2020s haunted house films, 2020s serial killer films, so understanding it makes those chapters shorter.
In everyday life: Look for The Black Phone outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study The Black Phone in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what The Black Phone means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain The Black Phone out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is The Black Phone in simple terms?

The Black Phone is a 2021 American supernatural horror film directed by Scott Derrickson from a screenplay he wrote with C. Robert Cargill, based on the 2004 short story by Joe Hill.

Why does The Black Phone matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study The Black Phone?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on The Black Phone.