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Literature / The Strange Case of Dr. Jekyll and Mr. Hyde

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"If each, I told myself, could be housed in separate identities, life would be relieved of all that was unbearable..."
Henry Jekyll
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Source of the Jekyll & Hyde trope, this 1886 book by Robert Louis Stevenson begins with a mystery. When a girl is brutally attacked late one night, her attacker, calling himself Mr Edward Hyde, buys off the witnesses with a cheque for a small fortune, signed by the eminently respectable Doctor Henry Jekyll.

Jekyll's friend and legal advisor, Gabriel John Utterson, is disturbed when he learns this, since Jekyll has recently made Hyde his heir. While Utterson investigates this, Hyde is witnessed committing a savage murder of a prominent Member of Parliament. Jekyll claims there is nothing to worry about, but Utterson becomes convinced his friend is being blackmailed. Before Utterson can do anything, Jekyll's butler Poole contacts Utterson to report that a stranger has locked himself in the lab. When they break into the room they find Hyde, having committed suicide by poison, and two letters explaining everything...

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The book can be read online for free here.

There have been several adaptations and parodies of this book. What makes them particularly interesting is not that each one changes, deletes, or adds certain elements but that they tend to make the same changes. In addition to, or instead of, the above story, here's what you'll usually find in film and stage versions:

  • Cutting the Twist Ending. The book is presented as a mystery, with the identity of Hyde as the surprise. But this is absent from most adaptations, mainly because the twist is now too famous to surprise anyone. Similarly, Hyde reverts to Jekyll upon death rather than remaining Hyde.
  • The physical appearance of Hyde. Films typically show Hyde as more physically-formidable than Jekyll (even huge and super-human in some versions), whereas in the novel Jekyll is well-built and Hyde, representing Jekyll's less-developed evil urges, is smaller than average. While Hyde is described as apelike and ugly, some adaptations have portrayed Hyde as more attractive than Jekyll.
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  • The nature of his split personality. In adaptations set in the modern-day, Jekyll is usually unaware or only vaguely-conscious of Hyde, suffering from split-personality amnesia. The book suggests that Jekyll remembers everything he does as Hyde, begins to find his own depravity horrifying and tries to dissociate himself from it. Hyde himself has unclear memories of what Jekyll does.
  • The Love Interest. Jekyll's good girl fiancée and Hyde's promiscuous barmaid/prostitute girlfriend. This plot thread, not part of the original story, occurs in almost all adaptations. In the book, no women have major roles.

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    Adaptations of note 
  • A highly-successful stage play which opened in America not long after the book came out and toured for 20 years. It was this play which introduced the idea of dual love interests for Jekyll/Hyde.
  • A play by Jeffrey Hatcher which has Hyde played by multiple actors and inverts the usual good-evil dynamic near the end, giving Hyde a measure of sympathy and making Jekyll cold and ruthless. This version took out Jekyll's fiancée, leaving only Elizabeth, a prostitute who loved Hyde unconditionally.
  • A play by Noah Smith, which had Jekyll's maid and butler act as a Greek Chorus and Jekyll battling with his hypocrisy as Hyde racked up a body count. Hyde plans to inject Utterson with the same chemical used to create himself, this giving Enfield, Utterson, and Lanyon larger roles. Jekyll's love interests were Enfield's aspiring scientist fiancée, Helen, and the brainy prostitute Cybel.
  • Straightforward film adaptations in 1920 (with John Barrymore), 1931 (with Fredric March and Miriam Hopkins) and 1941 (with Spencer Tracy, Ingrid Bergman and Lana Turner). Jekyll was cast much younger than he is in the novel, and female love interests are also added. They also abandon the character of Utterson and his investigation in favor of a story centered around Jekyll and Hyde. The 1931 film is probably the best-regarded film version. It offers a rare case of a horror film winning an Academy Award, as March won Best Actor for his portrayal of Jekyll and Hyde. The 1941 one was a direct remake of the '31 film.
  • The Janus Head, a 1920 silent German film version directed by F. W. Murnau and starring Conrad Veidt. It changed the characters' names to Dr. Warren and Mr. O'Connor to preserve the twist. Bela Lugosi co-starred as the butler. It is also apparently lost forever due to legal issues, but if the production notes are to be believed, it featured the first moving camera in cinema history.
  • A 52-part radio adaptation in 1932 which expanded considerably on the novel by following Jekyll's life from childhood until death. Jekyll is younger than in the book, Hyde's evil emerged in him when he was a child, and romance was also added.
  • Stephen Weeks's version, I, Monster, produced by Amicus Productions, kept the original plot but changed the names of Jekyll and Hyde in an attempt to preserve the twist.
  • The Nutty Professor (both Jerry Lewis' and Eddie Murphy's versions) are comedic takes on the concept, wherein a nerdy scientist morphs into a super-cool ladies' man.
  • The TV sitcom Family Matters had The Jinx Steve Urkel develop a potion which turns him into the Born Lucky "Stefan Urquelle."
  • The Two Faces of Dr. Jekyll plays around with the formula. Jekyll is hirsute, sloppily-dressed, mannerless and abrasive, while Hyde is handome and debonair. Jekyll is already married, but his obsession with his work leads his wife to cheat on him with their best friend. Hyde decides to frame Jekyll for 'their' crimes to force his hand and let Hyde remain in control forever.
  • A 1968 made-for-TV movie starring Jack Palance. This version took out Jekyll having a fiancee, leaving Hyde with Gwyn, a prostitute. This version is also notable for its two-hour length, and sticka close to the book in most respects, including Jekyll changing into Hyde upon death.
  • Dr. Heckyl and Mr. Hype, a 1980 comedy/horror with Oliver Reed, followed the Nutty Professor formula: the kindly Heckyl is horribly ugly while his violent alter-ego is good-looking.
  • The 1971 Hammer Horror Doctor Jekyll and Sister Hyde and the 1995 comedy Dr. Jekyll and Ms. Hyde add a Gender Bender twist to the story, with Jekyll as a man and Hyde as a woman.
  • Mary Reilly, told from the perspective of Jekyll's maid, tells the story with a romance/horror twist. Hyde was Jekyll's desperate attempt to become young and strong again.
  • Frank Wildhorn and Leslie Bricusse adapted it during the '90s into a stage musical, Jekyll & Hyde. This kept the changes from most adaptations. Its most famous scene is a song where Jekyll and Hyde sing a duet, arguing with each over control of their body.
  • Julia Jekyll and Harriet Hyde, a British kids' show about a schoolgirl whose science experiment goes wrong and makes her turn into a monster at random times.
  • Jekyll, a 2006 modern day TV miniseries involving a descendant of the pair, written by Steven Moffat. Also notable for an example of using the 'Jee-kyll' pronunciation, but only in the Victorian flashbacks.
  • In The League of Extraordinary Gentlemen and its film adaptation, Jekyll and Hyde are Expies of Bruce Banner and the Incredible Hulk, who were in turn based off Jekyll and Hyde. The pair can communicate: Jekyll sees Hyde in mirrors, and Hyde is omnipresent in his subconscious. Hyde's powers of perception are not usable by Jekyll unlesa the former advises the latter. The comic depicts Hyde as a huge mutant, which Hyde himself explain: Originally, as in the book, Jekyll was a strapping man and Hyde "practically a dwarf", but when separated into distinct individuals for prolonged periods, Jekyll grows weak and frail without Hyde's passion, while Hyde grew in power without Jekyll's morals to limit him.
  • Van Helsing had Hyde as the first monster the titular Van Helsing fights. Hyde is an ape-like monster who battles Van Helsing in the Batman Cold Open. Hyde turns back into Jekyll on his death, unlike in the original story. The London Assignment prequel fleshes out the backstory, with Jekyll having the hots for Queen Victoria of England and harvesting essence from young women to make her a temporary youth potion.
  • A Marvel Comics supervillain is named Mr. Hyde. He took direct inspiration from the book in creating his identity. Unlike Jekyll, both sides of him are evil.
  • A direct-to-video version starring Tony Todd in 2006. Unlike most adaptations, it tried to remain close to the novel by giving the impression that Jekyll and Hyde were two different people until about two-thirds of the way into the movie. It somewhat deviates from novel upon the reveal that Mr. Hyde is a mutant gorilla-monster created by nanomachines.
  • Jekyll + Hyde. A direct-to-video version starring Bryan Fisher in 2006. This was a very loose adaptation that used the narrative as a metaphor for drug abuse.
  • Jekyll and Hyde appeared briefly in The Pagemaster, with Hyde becoming the main villain of one of the video game tie-ins.
  • Several video games, only two of which are close to the original story. The NES game is hailed as one of the worst games of all time and was a catalyst for The Angry Video Game Nerd Youtube series and itself would later be adapted into a short film.
  • There's a 70s Blaxploitation flick, Dr Black and Mr Hyde, which cashed in on the Blaxploitation horror craze which began with Blacula.
  • An Animated Adaptation by Burbank Films Australia, notable for being the only major animated adaptation of the work.
  • ITV's series Jekyll and Hyde (2015) follows Robert Jekyll, grandson of the Henry Jekyll from the novel, and is set in the 1930s. It is a superhero-type show in the vein of X-Men, and as such, Hyde is just one of many supernatural creatures targeted by a sinister Creature-Hunter Organization.
  • Series three of Showtime's Penny Dreadful introduces us to Doctor Jekyll as a young half-Indian, half-British chemist, who went to medical school with Victor Frankenstein.
  • A minor character in Welkin Weasels is Professor Speckle Jyde, a mild-mannered gerbil who yearns to be a troublemaker, and so creates a potion which turns him into the obnoxious shrew Dr. Lycan Heck.
  • There's also a surreal comedy version by Studio A'yoy.
  • Hyde, a novel by David Levine. Told from Hyde's point of view, it posits that if Jekyll wasn't wholly good, who's to say that Hyde is wholly evil? It takes Jekyll's musings on man being more than two, unexplained occurrences and glossed-over details from the novel, and attempts to tie it all together.
  • Jekyll and Hyde appear in seasons 5 and 6 of Once Upon a Time. It's ultimately revealed that Hyde isn't actually evil but simply driven to act on every emotion, while Jekyll is far worse, performing evil actions despite being able to control himself.
  • The Search For Henry Jekyll, a web comic which takes inspiration from the book and adaptations to recount Utterson's investigation into Jekyll and Hyde. Things become more complicated when Hyde injects Dr. Lanyon with the serum, creating a villainous rival.
  • MK's The Strange Case of Dr. Jekyll & Mr. Hyde, another web comic which is both a retelling of the book and a bit of the play. In this version, Hyde is not all bad while not everything Jekyll does can be considered as entirely good. It also explores how good and bad are not cut-and-dry, and how social class can influence how good deeds are celebrated and bad deeds are overlooked.
  • The Glass Scientists takes place in a Fantasy Kitchen Sink universe, where Jekyll runs a society for mad scientists and works hard to improve their public image, while keeping his own double life a secret. This story focuses more on how Jekyll's own self-hatred and mental issues played a key role in Hyde's creation.
  • Russell Crowe plays both roles in the aborted Dark Universe, the shared universe of the Universal Horror films. This is in spite of the story not having been part of the original film series, as the two contemporary films mentioned above were made by Paramount and MGM, respectively.
  • Fate Series:
    • In Fate/Prototype: Fragments of Sky Silver, they are summoned as a Berserker Servant with Hyde as the dominant personality. In his Hyde form, he resembles a werewolf and is completely uncontrollable; his Jekyll form is a mild-mannered man who ironically developed the serum because he wanted to be a hero.
    • In Fate/Grand Order, both are summoned as an Assassin Servant with Jekyll as the dominant personality. His Jekyll form is a meek man who reluctantly fights with a knife. His Hyde form, though humanoid and able to communicate, fights like a Berserker.
  • A theater play by Nick Lane where Jekyll is physically weak but good and Hyde is powerful and strong but evil. Also introducea Eleanor O'Donnell, a celebrated, smart singer who urges on Jekyll's experiment despite knowing its potential outcome.


The novel provides examples of:

  • Amateur Sleuth: Utterson is a lawyer by trade but spends the bulk of the novel investigating Dr. Jekyll and his association with Mr. Hyde.
  • Ambiguous Time Period: Due to Year X being involved the most we know is that Jekyll was born in the 1800's and the story is set in the 1800's. The setting could just as easily be the 1850s if Jekyll was born in 1800, or the 1890s. The extent of our knowledge is that it is the Victorian era.
  • And Some Other Stuff: Lanyon recognizes a few of the ingredients used to make the potion (salt, phosphorous, blood-red liquor, ether), but the rest are unidentified.
  • Apocalyptic Log: The Reveal comes in two of these, one left by Dr. Lanyon, giving an account of how Jekyll revealed his secret to him, and the second a confession by Jekyll himself, written after he could no longer make the formula and realized Hyde would take over completely. Both are read by Utterson and they make up Chapters 9 and 10.
  • Applied Phlebotinum: A drug is the means by which Hyde is created. This was a time when chemistry, and especially the workings of the human mind, were still relatively unknown, and therefore could be used in the same way radiation was used as a reason for giant monsters and superpowers in the 1950s.
  • Bastard Bastard: Hyde is not only smaller but younger-looking than Jekyll, and Utterson briefly wonders if he's the by-blow of Jekyll's youthful indiscretions.
    "Poor Harry Jekyll," he thought, "my mind misgives me; he is in deep waters! He was wild when he was young; a long while ago to be sure; but in the law of God, there is no statute of limitations. Ay, it must be that; the ghost of some old sin, the cancer of some concealed disgrace: punishment coming, pede claudo, years after memory has forgotten and self-love condoned the fault."
  • Better to Die than Be Killed: Either Hyde or Jekyll decides to take cyanide rather than be caught and hanged by the police.
  • Big Bad: Edward Hyde, Jekyll's evil given form.
  • Bitter Almonds: Hyde takes cyanide to kill himself, which Utterson identifies by "the strong smell of [almond] kernels that hung in the air".
  • Blackmail: Near the beginning of the book, Jekyll has changed his will to leave everything to Hyde. The protagonists believe Hyde is blackmailing Jekyll and vow to find out how.
  • Body Horror: Though not pushed as far as later writers went with it.
  • Cane Fu: Hyde beats Sir Danvers Carew to death with Jekyll's cane.
  • The Case Of: One of the earliest works to use this intriguing title template.
  • Chromosome Casting: The only female characters are several of Hyde's victims mentioned in passing, a maid who witnesses Hyde's first murder, Hyde's landlady and Jekyll's cook. None are given names.
  • A Darker Me: This is the appeal of Hyde for Jekyll; he even refers to Hyde as "the darker side of my nature".
    Jekyll: This, too, was myself. It seemed natural and human.
  • Dead Man Writing:
    • Lanyon wrote a complete briefing about the night where Edward Hyde came to his house, took the potion, and turned into Jekyll. This is when The Reveal happens. Lanyon leaves instructions that the letter mustn't be opened before the disappearance or death of Henry Jekyll.
    • That's directly followed by the last chapter of the book, the letter that Henry Jekyll writes after he takes the last sample of his potion, in which he explains the case.
  • Death of Personality: Jekyll's letter explains that no matter what happens to him as Hyde, Jekyll will be dead.
  • Devil in Plain Sight: Everyone can sense that there is something wrong with Hyde because he is pure evil. They think he might be deformed in some way, but nobody can quite put their finger on how. Jekyll describes him as small and apelike, apart from the rest of humanity.
  • Dirty Coward: Hyde's sense of self-preservation makes him fearful of anything that could harm him. He and Jekyll spend their last days locked in the cabinet, moping and weeping over fear of being caught by the police.
  • Does This Remind You of Anything?:
    • The book is a thinly veiled metaphor for drug or alcohol addiction. Stevenson was an opium user.
    • The description of Sir Danvers' beauty, thought by some to make him sound rather camp, also gets read like this.
  • Downer Ending: Jekyll is transformed permanently into Hyde, and then dies by his own hand. Utterson, having failed to save his friend, is left to pick up the pieces.
  • Driven to Suicide: After Jekyll realizes that Hyde will take all control of him — both of his body and his personality — he restrains himself to his lab until the final transformation. Hyde takes cyanide when Utterson shows up outside the lab and demands to see Jekyll.
  • Epileptic Trees: In-universe, Jekyll speculates that man is more than two and he only says two because others will go farther than he did, and that if he'd taken the potion with nobler intentions it may have made him purely good instead of purely evil. Whether he's right or wrong about any of this is never revealed.
  • Evil Feels Good: This is the reason Jekyll thinks separating his evil side from his good side is a good idea. As Hyde, he's free to do anything without restraint from the law or his own conscience.
  • Evil Is Not a Toy: Releasing Hyde was easy. Getting rid of him proved impossible except via death.
  • Evil Makes You Ugly: Played with. Hyde "gave an impression of deformity without any nameable malformation" — that is, he isn't ugly in physical appearance, but something about him instinctively repels people. His attitude and behaviour are described with adjectives such as "troglodytic" and "ape-like" which also contributes to the impression of ugliness. Jekyll theorized that there is an instinctive disgust and hatred when people faces pure evil.
  • Extra! Extra! Read All About It!: "Special edition! Shocking murder of MP!"
  • Fantastic Drug: Jekyll makes a potion that brings out his evil side, which quickly spirals out of control. Some adaptations further the drug metaphor and have him inject the formula rather than drink it.
  • Foreshadowing:
    • The first hint we have of Jekyll and Hyde being the same is the handwriting of a letter. The idea is that Utterson has been told by Jekyll that the letter, supposedly written by Hyde, was handed in soon after the murder of the politican, but Jekyll's butler says nothing has been delivered in such a manner recently. Utterson's clerk then notices that the handwriting of Jekyll is similar to the handwriting in the letter. Utterson's first thoughts are that Jekyll faked the letter to hide Hyde.
    Utterson: (thoughts) What?! Henry Jekyll forge for a murderer?!
    • In chapter 1, the door of a house is described as sinister: it "was blistered and disdained, and bore in every feature, the marks of prolonged and sordid negligence." That's the door where Enfield told Utterson he saw Mr. Hyde enter. In Chapter 2, Utterson goes to the house of Dr. Jekyll, whose door is described as "with the air of great wealth and comfort," and he asks the butler, Poole, if Mr. Hyde has the key to the old dissection room. In chapter 7, Enfield realizes the first door is the back door of Dr. Jekyll’s house: Both doors, the sinister one and the comfortable one, belonged to the same house. Also, Dr. Jekyll’s hall is described as "a pet fancy of… the doctor’s; and Utterson himself was wont to speak of it as the pleasantest room in London." In contrast, the old dissection room is described as: "the tables laden with chemical apparatus, the floor strewn with crates and littered with packing straw, and the light falling dimly through the foggy cupola."
  • G.I.F.T.: The great appeal of Hyde to Jekyll is that he can't be held responsible for Hyde's crimes, until he murders a member of Parliament and cannot safely hide. This coincides with the potion losing potency, limiting both men's time.
    Jekyll: But for me, in my impenetrable mantle, the safely was complete. Think of it—I did not even exist! Let me but escape into my laboratory door, give me but a second or two to mix and swallow the draught... and whatever he had done, Edward Hyde would pass away like the stain of breath upon a mirror; and there in his stead, quietly at home... would be Henry Jekyll.
  • Go Mad from the Revelation: Dr. Lanyon after he sees Hyde transform into Jekyll for the first time. It ends up killing him.
  • Gone Horribly Wrong: The potion was supposed to completely separate the good and evil sides. Instead, it just separated the evil side, meaning that Jekyll was never pure good to balance out the pure evil. Jekyll considers this a good thing at first, because it allows him to act out all his repressed evil urges. Doing that works out pretty well, until the Split-Personality Takeover starts kicking in.
  • Good Is Impotent: After turning into Hyde in broad daylight, Jekyll notes that while he would have been too stunned to act, Hyde was proactive and set on his immediate goals.
  • Hair-Trigger Temper: A minor annoyance in conversation with Danvers Carew causes Hyde to fly into a rage and beat him to death.
  • Have a Gay Old Time:
    • Here is how Mr. Enfield explains his reluctance to start asking questions about other people's business:
    "...the more it looks like Queer Street, the less I ask."
    • Then there's how Jekyll describes the duality of man, using an old word for a bundle of sticks:
    "It was the curse of mankind that these incongruous faggots were thus bound together..."
  • Hearing Voices: After a certain point Jekyll was able to hear Hyde inside his head, constantly demanding to get out.
  • Higher Self: The Fantastic Drug Dr. Jekyll drinks allows him to "disappear" his Higherself, letting only the lower self, Mr. Hyde.
  • Hope Spot: After Hyde murders Danvers, he disappears without a trace and Jekyll assures Utterson that he's cut off all contact with Hyde and becomes much happier and more sociable with Hyde gone. Then Jekyll suddenly begins locking himself in his room and refusing to show himself to anyone, and things go downhill fast from there.
  • Humanoid Abomination: Hyde is a fairly normal looking man, yet everyone who meets him feels that there is something physically wrong with him, as if he is ugly or deformed in some way that they just can't identify. The reveal that he is Jekyll's inner darkness incarnate implies that what they were picking up on was that Hyde is Made of Evil and that this was emanating from him in some way.
  • Hypocrite: Jekyll does not take responsibility for the evil actions of Hyde, yet he takes the potion specifically to enjoy performing evil actions as Hyde. Stevenson called this Jekyll's Fatal Flaw in a letter to a friend.
  • In-Series Nickname: While most people call Jekyll by his last name, or by "Henry," Utterson is close enough to call him "Harry."
  • Incredibly Lame Pun:
    Utterson: If he be Mr. Hyde, I shall be Mr. Seek.
  • Involuntary Shapeshifter: After months of taking the potion, Jekyll found that he was turning into Hyde without it.
  • Jekyll & Hyde: As the Trope Maker, the book naturally shows the unbuilt stage of this trope. Henry Jekyll, who is explicitly stated to be capable of both good and evil, deliberately created Edward Hyde for a selfish purpose and actually enjoyed what his darker side brought out until a murder was committed. He began to need more of the potion to ward off Hyde taking control, and when recreating the formula proved impossible he wrote a letter to explain everything before dying. In modern times, this is now an idiom that describes someone who is nice one minute, nasty the next, or someone who's outwardly respectable but leads a seedy double life.
  • Left Hanging: We aren't shown how Utterson reacts to what he reads or what happens afterward.
  • Let Us Never Speak of This Again: Utterson and Enfield vow to never speak of the incident at the crossroads to anyone. Jekyll also deflects suspicion from himself by asking his friends to not bring matters up.
  • Miraculous Malfunction: An "impurity of salt" is what makes the transformation from Dr. Jekyll into Mr. Hyde possible. This is what finally dooms Jekyll—he doesn't know what the impurity is, and when his salt runs out, he can't replace it.
  • Morally Ambiguous Doctorate: Jekyll, particularly in the original book, where his reason for continuing to imbibe the potion was to do bad things and not get caught. His alter-ego, Mr. Hyde, averts this.
  • My God, What Have I Done?: Jekyll after Hyde kills Danvers Carew. After this, he stops characterizing Hyde as being a part of himself, instead attempting to distance himself from the persona by referring to Hyde as a separate entity attempting to seize control of his body.
  • The Napoleon: Hyde is frequently described as being "short," "small" and even "dwarfish," in contrast to the taller Jekyll. This is explained as being because Jekyll never indulged in his evilness before, so his evil side is "underdeveloped."
  • Never My Fault: Even when writing his final letter, Jekyll still insists that, even now, he doesn't consider Hyde's actions his actions. His choice of pronouns says otherwise.
  • No Plans, No Prototype, No Backup: This is an accident on Jekyll's part, as it turns out to be an unknown impurity that makes the stuff work.
  • No Pronunciation Guide: According to the author it should be "Jee-kyll", not "Jeh-kyll". Not that that's ever stopped anybody from pronouncing it "Jeh-kyll" for over a century.
  • Noodle Incident:
    • Stevenson never goes into great detail about most of the things that Hyde does on his nightly escapades before crossing the invokedMoral Event Horizon by murdering Sir Danvers Carew for no reason; the narrative only states that his activities were of an evil and lustful nature. Given the Victorian England setting and what was considered abhorrent for the time, he may have been engaging with prostitutes and drinking heavily in shady taverns, possibly smoking opium, but we can only surmise. Jekyll's own youthful vices are likewise undescribed.
    • The maid that recognizes Hyde after Carew's murder mentions him visiting her master at least twice, a detail the book never mentions again.
    • What Lanyon and Jekyll talked about post-transformation isn't committed to paper, though they talked for at least an hour.
  • Obviously Evil: Hyde's appearance is banal, yet everyone who looks at him instinctively recognizes that he's evil.
  • Perspective Flip: Dr. Jekyll's narrative at the end of the story gives the other perspective of the events that Utterson was investigating. Why did Jekyll shut himself up in the house? Because he started spontaneously changing into Hyde. Why did Jekyll have Utterson accept a will leaving all Jekyll's money to Hyde? Because Jekyll is Hyde. Why did Henry Jekyll write a frantic letter to Lanyon to retrieve his chemicals, followed by Edward Hyde arriving and transforming into Jekyll before Lanyon's eyes? Because Jekyll transformed into Hyde without use of the drug, in broad daylight in a public park, and could not access his chemicals, so he had to send Lanyon to retrieve them.
  • Professor Guinea Pig: The Ur-Example, beating out The Invisible Man by a decade. Jekyll tested his experimental formula on himself.
  • Psycho Serum: The Trope Maker.
  • Pure Is Not Good: Henry Jekyll, a man with mostly good and some evil urges, thinks that if he could separate his good and bad urges into separate identities, life would be better, because he would be free of morality and could indulge himself on every pleasurable vice without hypocrisy. Hyde himself is pure, but pure evil and cares for nothing but himself, only using Jekyll's form as a hiding place.
    • Also demonstrated by how Jekyll thinks that the reason the new salt he ordered for the potion didn't work was because the salt wasn't pure like the original salt he used, only to realize later on that it's more likely the original salt was impure and the potion worked precisely because of that unknown impurity.
  • Redundant Parody: That infamous Incredibly Lame Pun about playing "Mr. Hyde and Mr. Seek" or "Mr. Hyde-And-Seek" is in fact made in the original book.
    Utterson: If he be Mr. Hyde, I shall be Mr. Seek.
  • The Reveal: The reason Dr. Jekyll was helping Mr. Hyde is that they are the same person- Jekyll transformed into Hyde by means of a potion he created to separate a man's good and evil sides. It's well known by now.
  • Sex Is Evil, and I Am Horny: It is implied that among Jekyll's vices was womanizing. In his confession, the doctor characterizes "a certain impatient gaiety of disposition" as the worst of his vices. At the time, "gay" was used to describe a heterosexual person who was inordinately lustful.
  • Shadow Archetype: Hyde is Jekyll's repressed depravity given form and a name.
  • Small Role, Big Impact: A maid recognizes Hyde after he murders Carew, making him a wanted fugitive unable to go about openly.
  • The Smurfette Principle: No nominal women appear in the original book or even get involved in the plot except as spectators or victims.
  • Split-Personality Takeover: Likely the Ur-Example. The more Jekyll takes the potion, the stronger Hyde's influence becomes, and it gets to the point where if he dozes off or even blinks he changes to Hyde.
  • Spontaneous Crowd Formation: Despite Hyde running into the little girl at around 4 in the morning, a sizable crowd gathers around them.
  • Technicolor Science: The potion starts out red and then turns purple before settling on green. When it doesn't change to green near the end, the potion does not work, and Jekyll realizes that he is truly screwed.
  • The "The" Title Confusion: The book was first published as "Strange Case of Dr Jekyll and Mr Hyde". Later reprintings added a "The" to the beginning.
  • This Is Your Brain on Evil: The addiction metaphors are obvious and appropriately creepy. This was written at a time when the effects of opium addiction were just coming to light.
  • Tuckerization: Stevenson named Jekyll after his friend Walter Jekyll, whose sister Gertrude became one of the most famous gardeners of her generation.
  • Twist Ending: The twist of Jekyll and Hyde being the same person comes at about the 3/4 mark, and then closes out with Jekyll's own posthumous explanation for everything that happened.
  • Uncanny Valley: In-universe, this is how the other characters describe Hyde and recognize that he's not quite right. They always describe him as looking "deformed" somehow, despite having no outwardly noticeable disfigurements.
  • Unstoppable Rage: After Hyde goes into a rage and attacks Carew, he exults in the thrill of the evil action and beats the man to death.
  • Would Hurt a Child: In his first appearance Hyde literally walks over a little girl he meets on the street.
  • Year X: Used several times. For instance, the Carew murder happened in 18— and in his statement, Jekyll writes that he was born in the year 18—.


Tropes common to multiple adaptations:

  • Adaptational Badass:
    • The part about Hyde being a diminutive man, much smaller than Jekyll, is usually adapted out. Instead, Hyde is usually portrayed as a burly brute of a man, larger than Jekyll, or the same size. (This is acknowleged in volume 2 of The League of Extraordinary Gentlemen, in which Hyde is basically the Incredible Hulk. Apparently he started out as the book version, but the more Jekyll indulges Hyde, the more powerful Hyde becomes.)
    • Some film adaptations give Lanyon a larger role, having him be the one to stop Hyde.
  • Adaptational Heroism: In the book Jekyll took the potion to indulge in his vices and evade responsibility and consequences for his actions, giving him freedom to do whatever he pleased. Most adaptations, however, have Jekyll as a humanitarian scientist who wanted to separate good from evil to eliminate wrong from the world, or a fundamentally good man who just wouldn't take no for an answer—albeit he still enjoys the freedom Hyde's form provides at first.
  • Alternate Identity Amnesia: Adaptations set in the present day tend to have Jekyll not know what he does as Hyde, while the book, plays, musical, and earlier film versions have him remember everything he does.
  • Artifact Title: A good number of adaptations preserve the "Strange Case" portion of the original title. To the modern audience, it's not much of a mystery anymore since adaptations typically show the story from Jekyll's point of view.
  • Betty and Veronica: Many adaptations add contrasting female companionship options that weren't in the book, an innocent girlfriend/fiancee for Jekyll and for Hyde an earthier, more sexually available woman that he brutalizes.
  • Demoted to Extra: The fate of Mr. Utterson, due to most adaptations centering on Jekyll from the start rather that Utterson investigating a mystery, as the novel did. In the 1920 film he pops up towards the end as one of Jekyll's friends, in the 1931 film he is an extra, and in the 1941 film he's completely omitted.
  • Pragmatic Adaptation: Jekyll wasn't the central character of the original story—the story is told from the POV of Mr. Utterson, Jekyll's old friend and lawyer who investigates the mystery. Most of the story depicts Hyde's actions as being told about instead of shown. The twist ending was revealed in letters where everything is told instead of shown. Most adaptations, instead, focus on depicting Jekyll's dramatic struggle between his two selves and his eventual downfall, since everybody already knew the ending.
  • Super-Powered Evil Side: In many modern adaptations, such as Van Helsing and ITV's Jekyll and Hyde, Hyde possesses superhuman powers, most commonly inhuman strength.


The 1920 movie provides examples of:

  • Adaptation Name Change: Sir Danvers' name was changed to George.
  • Adaptational Villainy: While Carew in the book was described in almost angelic terms, here he's closer to Lord Henry from The Picture of Dorian Gray, corrupting Jekyll into sin.
  • Chekhov's Gun: The Poison Ring that Hyde takes from Gina. At the end, Jekyll swallows the poison to stop Hyde from raping Millicent.
  • The Film of the Book: While still using the Betty and Veronica trope and not being a mystery, this film is somewhat more faithful to the novel than the 1931 and 1941 adaptations. Utterson appears in this version, although his importance is reduced, and Jekyll poisons himself rather than being shot as in 1931 and 1941.
  • Opium Den: Hyde visits one, although he doesn't take any opium.
  • Mushroom Samba: An opium addict in withdrawal starts hallucinating red ants.
  • Poison Ring: Gina, the Italian dancer that is the Veronica in this version's Betty and Veronica pair, has an old ring that has a secret capsule for storing poison (this actually being an old myth about Lucrezia Borgia).
  • Shout-Out: Sir George Carew's quote, "The only way to get rid of a temptation is to yield to it", is a direct lift from Oscar Wilde and The Picture of Dorian Gray.


The 1931 movie provides examples of:

  • Adaptation Name Change: Jekyll's fiancee went from Millicent Carew to Muriel Carew.
  • Evil Makes You Ugly: Although Mr. Hyde looks simian and unattractive in first appearance, as his evil acts continue, his appearance grows more monstrous.
  • Happy Rain: On his first experience outside, Mr. Hyde happily removes his top hat and feels the rain on his face, even drinking it. This is his first taste of liberation from Jekyll and his rigid world.
  • Intro-Only Point of View: Jekyll's introduction is portrayed as such: playing the organ, "insulting" his butler Poole, looking at a mirror (which reveals his face) donning his Hat, Inverness Cape, and Cane, riding a coach, and entering the University (while giving his Hat, Cape, and Cane to a custodian) before he makes his proper appearance on camera.
  • MsFanservice: In bed, Ivy strips off her clothes before Jekyll to seduce him. When he leaves, she teases him to come back, swinging her exposed naked leg.
  • Split Screen: Used three times in the film.


The 1941 movie provides examples of:

  • Adaptation Name Change: Jekyll's fiancee went from Muriel Carew to Beatrix Emery, and Sir Danvers' name was also changed to Sir Charles Emery.
    • Ivy Pierson's last name is changed to Peterson.
  • Animal Testing: Jekyll first tests his formulas on animals. Despite claiming none of them died, when he returns from an outing he discovers they're all dead.
  • Book-Ends: The film begins and ends with Psalm 23 ("The Lord is My Shepherd..."); Sung as a Church hymn in the opening, and then spoken as a prayer by Poole at the closing.
  • Composite Character: Lanyon takes Utterson's role as Jekyll's friend who helps investigate Hyde and Lanyon's role as a skeptical doctor who first sees him transform.
  • Getting Crap Past the Radar: A pretty startling example for 1941. During a transformation montage, we see Jekyll as a carriage driver gleefully whipping his horses. Then the horses transform into Beatrix and Ivy, and Jekyll continues to whip them.
  • Gory Discretion Shot: What Hyde did to Ivy's back is only seen by the other characters. Later, it's implied that he strangles Ivy and beats Beatrix's father to death, but in both cases the victim is kept off-screen.
  • Hope Spot:
    • After Beatrix's return to London, the planning of their wedding date, and learning how Hyde had abused Ivy, Jekyll swears to avoid the Hyde personality altogether. Things don't work out.
    • Jekyll breaks up with Beatrix, leaving her crying. He turns back (in a Knee-High Perspective) to which Beatrix responds as an act of reconciliation...until she sees it is Mr. Hyde who has returned.
  • Lighter and Softer: Due to the implementation of the Hays Code, the violence and sexual content is toned down from the '31 movie.
  • Line-of-Sight Name: After receiving a letter from Lanyon worrying about Jekyll, Bea improvises a letter from Jekyll by looking at a newspaper next to it.
  • Mirror Scare: In a moment reused from the 1931 film. Ivy, having just (so she thinks) escaped Hyde's grasp, sits in front of her mirror and toasts herself. Just as she finishes raising the glass, the door opens.
  • Not Even Bothering with the Accent: Tracy, like March before him, doesn't even try for any kind of British accent. Bergman also keeps her Swedish accent.
  • Rape Discretion Shot: When Hyde gives Ivy a lift home after getting her fired, the shot fades to black as he looms over her and she says, "No... no..."
  • The Remake: The movie is a direct remake of the 1931 version and was made to eclipse it in popularity, to the point that the studio bought the rights to the previous film and tried to have all existing prints destroyed.
  • Shell-Shocked Veteran: Jekyll is inspired in his experiments by a man who lost his mind after an explosion. Jekyll believes that he's not insane, but merely letting his evil side completely consume him.
  • Visual Innuendo: During one of the hallucinatory montages when Jekyll transforms into Hyde, he has a vision of Ivy the barmaid's head as the cork in a champagne bottle—and the cork pops.


Alternative Title(s): Strange Case Of Dr Jekyll And Mr Hyde, Dr Jekyll And Mr Hyde, The Strange Case Of Doctor Jekyll And Mr Hyde

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