[[quoteright:300:http://static.tvtropes.org/pmwiki/pub/images/innerspace-poster_9538.jpg]]

->'''Tuck''': Jack, excuse me, but I want you to factor this into your thinking, alright? ... If you don't help me, you're going to wind up with this miniaturized submersible pod floating around your insides with this teeny tiny human skeleton at the helm.
->'''Jack''': Ugh.
->'''Tuck''': Not a pretty thought!

A 1987 sci-fi comedy starring Creator/DennisQuaid, Martin Short and Creator/MegRyan. Rather surprisingly not the huge hit it was anticipated to become at the time, it has since attained to cult classic status as one of the quintessential 80's popcorn flicks.

Quaid plays Tuck Pendleton, a Navy pilot assigned to pilot an experimental submersible that is to be shrunk down and injected into a rabbit. Unfortunately, bad guys after the shrinking technology break into the lab, and one of the scientists, escaping with the syringe containing the shrunken sub with Pendleton in it, is forced to inject Pendleton into unwitting Safeway clerk Jack Putter.

''Then'' [[WhatDoYouMeanItWasntMadeOnDrugs things get weird]]. (Well, weird''er''.)

The film was directed by Creator/JoeDante, produced by Creator/StevenSpielberg and features special effects by Rob Bottin, which might help give you an idea of what you're in for.

Not to be confused with cult classic PC game ''VideoGame/OperationInnerSpace'' or the long closed [[Ride/DisneyThemeParks Disneyland]] ride ''Adventure Thru Inner Space''.
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!!This film provides examples of:

* TheEighties
* ActionSurvivor: Jack, to a "T."
* AdrenalineMakeover: Jack, again. A rare male example, and in the most literal sense possible. Tuck ''literally'' stimulates Jack's adrenal gland!
* AgonyOfTheFeet: Tuck hurts his foot on the cab door and jumps around in pain.
* AliceAllusion: The "Eat me. Drink me." metaphor. Or was it from ''Film/TheExorcist''?
* AlmostOutOfOxygen: Tuck has a very limited supply of oxygen, so Jack must get him (and the chips) back to the lab before it runs out. A RaceAgainstTheClock begins.
* AMFMCharacterization: Igoe's taste in music tells much about him. When he drives the meat truck the music he listens to is Music/{{Slayer}}'s "[[https://www.youtube.com/watch?v=K6_zsJ8KPP0 Angel of Death]]".
* AndMissionControlRejoiced: Everyone at the lab is cheering when Tuck emerges from the minisub at the end.
* AndTheAdventureContinues: At the end of the film, a newly-empowered Jack sees [[spoiler:the Cowboy disguised as Tuck and Lydia's limo driver (with Scrimshaw and Dr. Canker hidden in the trunk, but Jack doesn't know it)]] and chases after them.
* AppliedPhlebotinum: The whole plot [[MacGuffin revolves around]] retrieving the one-of-a-kind miniaturization/re-enlargement chips. Both projects have entire, working installations devoted to the miniaturization process, but for some reason even the villainous rivals need exactly the same chips as the government-funded laboratory.
* AwesomeButImpractical: Using robot arms to place the chips. Lampshaded when an impatient scientist grabs the chip from the robot and puts it in manually (he ''do'' gets a jolt because of it, though).
* BigBad: Victor Scrimshaw.
* BillionsOfButtons: Vector-Scope labs features panels with lots of blinking lights.
* BlindedByTheLight: Tuck when the doctor shines an instrument in Jack's ear.
* BondOneLiner: "Congratulations, Jack. You just ''digested'' the bad guy." Jack then burps.
* BrickJoke: "Who's the Cowboy?!" -- "[[ClassifiedInformation That's, er, classified]]."
* {{Brownface}}: Creator/RobertPicardo as The Cowboy. It helped that Picardo himself is of Italian heritage.
* CatchPhrase: "The Tuck Pendleton machine, zero defects."
* CharacterDevelopment: Jack grows from a nerdy, cowardly hypochondriac to a man with a zest for adventure over the course of the movie.
* ChaseScene: One early on involving a scientist on a bicycle, another one later involving Tuck's Mustang chasing the refrigerated truck where Jack was held captive.
* ChekhovsBoomerang: Lydia's taser becomes plot-relevant a second time when Scrimshaw's blond mook touches it and goes out.
* ChekhovsGun:
** Sam Cooke's song "Cupid".
** Jack's allergy to hairspray.
* CigaretteBurns: The Cowboy puts his cigar out in his hand when a stewardess reminds him that it was a non-smoking flight.
* ComputerVoice: The computer aboard the minisub.
* CoolShip: Tuck's minisub, reminiscent of the ''[[Film/TwoThousandOneASpaceOdyssey Discovery]]'''s space pods, and armed with an amazing array of gadgets and sensors. It even recognized Jack's human physiology immediately and auto-mapped it despite having been programmed to go into a ''rabbit''.
* DareToBeBadass: Tuck gives a minor RousingSpeech to Jack when the latter is trapped in a refrigerator truck by Scrimshaw and Mr. Igoe. It works ''a little too well'', or, at least, a little too early -- the truck is still moving!
* DeadpanSnarker: The lady with orange hair delivers some pretty deadpan remarks at the checkout.
-->(The register displays $18,748.15) - "Gee, that's kind of pricey for shampoo, ain't it?"
-->(Seeing her grocery totaling to $128,658.54) - "Is that with or without the coupons?" and "Listen sweety, I don't carry that kind of cash around with me."
* DelayedReaction: At the end when they try to re-enlarge the minisub, nothing happens for a couple of seconds after the countdown has ceases. Then the reaction kicks in big time.
* DepravedBisexual: The Cowboy seemed oddly... ''excited'' when Jack aggressively bursts into his hotel room while he's in his underwear. He even excitedly exclaims "Big Jack!"
* DismantledMacGuffin: There are two chips at different places that Jack has to find before he can bring Tuck back.
* DisposableVehicleSection: Igoe pulls this trick when his miniaturized pod is damaged beyond repair. In the style of an ImplacableMan he ejects himself out of it and continues attacking the hero wearing a gadget-loaded space suit.
* TheDragon: Mr Igoe.
* DreamingOfThingsToCome: Jack's dream about the old lady with a (cigarette lighter) gun and the high prices of her groceries.
* DrowningMySorrows: Tuck, a washed-out Naval Aviator, was already an alcoholic ''before'' Lydia dumped him, then he got worse. Although he claims to have sobered up before the miniaturization project, it's obvious to his coworkers that he's off the wagon (and also to the audience, judging by all the bottles he keeps stashed away in odd places in his apartment).
* EiffelTowerEffect: San Francisco's Transamerica Tower is visible in the background outside Tuck's home.
* EnhanceButton: Downplayed. The photo camera Igoe confiscates at the mall provides close-up shots of Jack's name tag in pristine resolution.
* EveryoneCallsHimBarkeep: The Cowboy, master of industrial espionage, counterfeit, smuggling, and snakeskin clothing.
* ExactTimeToFailure: Tuck has a very limited supply of oxygen, so Jack must get him (and the chips) back to the lab before it runs out.
* ExplosiveDecompression: What would happen to the minisub if the cockpit were breached, which is why Tuck can't just gof to the lungs to resupply his oxygen tanks.
* ExplosiveInstrumentation: When Jack's VHS catches fire, the panels in Tuck's minisub start to do the same and both characters have to use a fire extinguisher to take care of the situation.
* {{Fainting}}: Scrimshaw's blond {{mook|s}} [[RunningGag keeps passing out]] amidst too much excitement.
* {{Fanservice}}: For the ladies [[HoYay and others]], a long glimpse at Dennis Quaid's bare ass.
* FantasticVoyagePlot: Self-explanatory. The effects are still awesome enough to be a deep well of {{Squick}} for some viewers.
* FeetFirstIntroduction:
** The first we see of the Cowboy is a close-up on his posh leather boots.
** Igoe is introduced by showing his black ConspicuousGloves on the steering wheel of his car.
* ForcedPerspective: After Scrimshaw and Canker are shrunk 50%, there are a few scenes where they are seen with full-size actors. These shots were filmed using forced perspective. For the car scene, the rear of the car is actually twice as large as a normal car rear, and was about 20 feet away. During the scene half size hands and double-size heads were used. Using this method, the film makers didn't have to worry about compositing two separate shots in post production, so the shots could be completed quicker. Even in the final scene with the suitcase, the case was twice as large, but the hand that closes it was real, closer to the camera in sync with the closing.
* ForScience: What the original government project was intended for. The rival lab, on the other hand, has more lucrative goals in mind.
* GetAHoldOfYourselfMan: Jack gets slapped as he is having a psychotic breakdown behind the cash register.
* GettingCrapPastTheRadar: Did they really show Igoe attaching a vibrator to his SwissArmyAppendage before getting private with Margaret? The camera angle certainly was ambiguous enough for the scene to pass the censors. The scene was cut on TV versions though.
* GlassesPull: Pete Blanchard pulls off his glasses in the car when learning that Tuck is the pilot of the secret project.
* GunStruggle: Jack fights with the delivery man over a gun. A GroinAttack decides the situation in Jack's favor.
* HeadphonesEqualIsolation: Mr. Igoe puts on his Walkman as he drives the truck Jack is imprisoned in. Naturally, he never even realizes he's involved in a ChaseScene.
* HearingVoices: Justified. Tuck communicates with his host via an electronic linkup in Jack's ear, and naturally Jack initially thinks he is insane when he hears Tuck's voice inside his head.
* HeelFaceTurn: Tuck's "friend" and government money man Pete Blanchard is quite the ruthless S.O.B. early in the film, willing to sacrifice Tuck's life to ensure the survival of Dr. Niles' project, but then randomly at the end turns up to personally chauffeur Jack back to Niles' lab to save Tuck.
* HeroicSacrifice: Scientist Ozzie Wexler dies via a gunshot to the back whilst injecting Tuck into Jack.
* HeroStoleMyBike: Early on, the scientist with the syringe steals a bike to get away from Igoe.
* HollywoodAcid: Jack's stomach -- especially [[StrippedToTheBone what it does to]] [[spoiler:Mr. Igoe]] in the final battle. (Thanks a whole lot, Rob Bottin.)
* HotScientist: Margret Canker, ''and how''.
* HotScoop: Lydia.
* [[IllGirl Ill Boy]]: Jack ''believes'' he is one of this. As it happens, he's the ultimate hypochondriac, to the point he might really give himself a heart-attack by stressing out over having a heart-attack.
* ImDyingPleaseTakeMyMacGuffin: After being shot, Ozzie uses the last of his strength to inject nearby passer-by Jack with the syringe containing the miniaturized submersible.
* ImplacableMan: Mr. Igoe redefines the trope.
* ImprobablyCoolCar: Tuck's pristine red Mustang convertible.
* InstantSedation: The baddies sedate the personnel at Vector-Scope with a knockout gas that takes them out in a single second.
* IntrepidReporter: Lydia, Tuck's girlfriend.
* JanitorImpersonationInfiltration: The baddies disguise as cable guys when breaking into Vector-Scope labs.
* JerkWithAHeartOfGold: Tuck. Pompous and alcoholic but if you need him he can help you and give you good advices.
* LockedInAFreezer: Jack is trapped in a meat truck at freezing temperature.
* LoveTriangle: More or less. Jack is attracted to Lydia who still loves Tuck but has some minor affection for Jack, as evidenced by still wanting to kiss Jack after Jack asks Tuck to shut down and the lingering glance at Jack before she gets in the limo ''at her wedding''.
* MadScientist:
** Dr. Canker. With a touch of MadDoctor.
** Dr. Niles. Dr. Canker is sort of his DistaffCounterpart.
* MagicFeather: Jack, when he thinks Tuck is still inside him and feeding him doses of adrenaline, rescues Lydia bravely.
* MagicPlasticSurgery: Thanks to the little guy inside you who can stimulate your facial nerves ''just'' so. ([[PanderingToTheBase Real reason]]: because every Joe Dante movie needs a TransformationSequence, that's why.)
* MaleGaze: Twice does Tuck call Jack out for inappropriately looking down on Lydia.
* MassOhCrap: Everybody in the room craps their pans when Jack!Cowboy undergoes his [[BodyHorror facial deformation sequence]].
* MayDecemberRomance: Implied with [[spoiler: Wendy and Dr. Greenbush after Jack ditches her]].
* MeaningfulEcho: Early on, Tuck hurts his toe on the cab door prompting Lydia to comment "Better your toe than your heart". Later when Tuck wants Lydia to believe he is inside Jack, her echoes that line when saying "[[CrowningMomentOfHeartwarming But it was my heart that was broken, and not my toe]]."
* MiniatureSeniorCitizens: The villain couple getting miniaturized.
* MirrorMonologue: Tuck is having one right before going onto his mission.
* MisappliedPhlebotinum: The miniaturization process is described as "breaking an object down to its component particles to 'compile' a microscopic version of the object". The first part would be called "destructive uploading", and is actually being seriously researched both for machines and people (there are ethical concerns for people, as even if you can perfectly reconstruct the human, it's still essentially murder by perfect [[DisposingOfABody body disposal]], but it's a secret government project doing it meaning ScrewTheRulesIMakeThem). But if they can "compile" Tuck as a human the size of an amoeba while retaining his intelligence, ''then they have a computer chip that makes the NSA's best stuff as of today look like an abacus.'' [[FridgeBrilliance You'd need that kind of processing power to upload stuff]], but that's civilization-changing technology. And they're using it, with NoPlansNoPrototypeNoBackup, on a ''rabbit'', as a precursor to fitting people with sensory-jacking surveillance equipment. ReedRichardsIsUseless.
* MohsScaleOfScienceFictionHardness: This film is fairly soft SF.
* MultitaskedConversation: Confusing talk in the hospital, when Tuck (inside Jack) tries to talk to Jack who believes some patients are talking to him.
* MundaneMadeAwesome: Thanks to Joe Dante, DP Andrew Lazlo, and the late Jerry Goldsmith, a glass full of ice (which Tuck will end up drinking from) becomes a mysterious background for the film's title card.
* MySecretPregnancy: [[spoiler:Lydia, who keeps it from Tuck. The thing is, when he found out (in the ''weirdest'' way possible, mind you), he was crying TearsOfJoy. Referenced again at the end when Tuck's first words to Lydia after being returned to normal were, "Why didn't you tell me?"]]
* NamesToRunAwayFromReallyFast: Dr. ''Canker''.
* NiceJobBreakingItHero: Lydia accidentally taking Jack out with her StunGun.
* NoodleIncident: Something must have happened between Ozzie Wexler and Dr. Canker.
* NoPlansNoPrototypeNoBackup: The chips. {{Lampshade|Hanging}}d. They're one-of-a-kind, nobody can replicate them or their technology (at least not before Tuck's oxygen runs out), and nobody made backups in case they were lost or damaged.
* OhCrap: Tuck can be heard saying "Uh oh" when Jack is caught posing as the Cowboy.
* OnlyALighter: When working as a store clerk, the protagonist has to deal with a customer who pulls a "gun" out of her purse when she gets annoyed with him only for it to turn out to be a lighter.
* OnlyInItForTheMoney: It's Scrimshaw's sole motivation in all this.
* PairTheSpares: Wendy and Dr Greenbush share a longing glance at the end.
* PintSizedPowerhouse: Scrimshaw and Dr. Canker, after [[spoiler:getting shrunk down to midget size]].
* PokeThePoodle: Igoe pops a balloon because he's EVIL!
* PoliticallyIncorrectVillain: Scrimshaw's line "Nuclear weapons, everyone's got em, no ones got the balls to use them".
* PreMortemOneLiner:
-->'''Tuck:''' Okay, pal... here's how ''I'' spell 'relief'!"
* PunctuatedForEmphasis: Lydia's line "Let. Him. Go." while pointing a gun at the baddies in their lab.
* RaceAgainstTheClock: To rescue Tuck, who is AlmostOutOfOxygen.
* ReasonableAuthorityFigure: Project leader Dr. David Niles is rather likable and understanding for a gub'mint scientist.
* RevealShot:
** The opening credits occur over weird, shifting, oddly coloured shots which suggest a bizarre, alien world, in keeping with the film's plot. Then, the camera pulls back...to reveal we've been watching ice cubes swirling around a glass of whiskey.
** When we first see Martin Short's doctor's office, its a closeup of some palm trees. But then the camera zooms out to reveal its simply a poster.
* RightManInTheWrongPlace: Jack, becoming the UnlikelyHero of the story by being at the wrong place at the wrong time.
* RiskyBusinessDance: Jack performs one at Tuck's place after getting drunk.
* SelfInducedAllergicReaction: Tuck is running out of air in his pod and needs to get out of Jack's body soon or he'll die. Currently he is in Jack's lungs, but can't get to a handy orifice in time. Somebody remembers that a human sneeze travels at roughly 300 miles per hour - leading Jack to induce a sneeze by huffing hairspray, as he was diagnosed with an allergy to same at the beginning of the movie.
-->'''Jack:''' Not ''mousse!!''
* ShapeShifterSwanSong: Jack's face goes through several gruesome stages of deformation once the facial reconstruction mechanism goes haywire.
* ShirtlessScene: A fanservice scene when Creator/DennisQuaid chases after Lydia outside his house with only a towel around his waist.
* ShockinglyExpensiveBill: After Tuck's pod is injected into Jack, he starts trying to figure out what's going on while Jack is ringing up items at his job. His attempts screw with the scanner, causing the items to ring up at hundreds of dollars each.
* ShoutOut:
** ''Literature/AliceInWonderland''. Though why anyone would set up the miniaturization/re-enlargement process selection screen that way is anyone's guess.
** ''2001: A Space Odyssey'', in the aforementioned design of the pod. And the... ''unusual'' way Tuck meets [[spoiler: his child]] for the first time.
** There's plenty of WesternAnimation/LooneyTunes references, including a cameo by ChuckJones in the grocery store scene.
** At one point, Jack attempts to comfort himself by turning on ''Series/{{Scrabble}}''.
* SilentWhisper: What did the Cowboy whisper in Lydia's ear that make her frown in disgust?
* SleepsWithEveryoneButYou: Jack Putter's dysfunctional love interest Wendy idly remarks on the irony of her [[ReallyGetsAround sleeping with just about everyone]] he knows except him when he's the one guy she might actually like. At the end, after he's taken a level in badass and she tentatively suggests they start dating ("Jack, I think we should try dating. Maybe not exclusively at first, at least for me, but... "), he brushes her aside with a quick "not a chance" before moving on to his next adventure.
* SmokingBarrelBlowout: Igoe blows his FingerGun out after shooting the lab scientist at the mall.
* SomethingOnlyTheyWouldSay: The way Jack convinces Lydia that Tuck really ''is'' miniaturized.
-->'''Jack:''' ''(repeating Tuck)'' "I don't blame you for walking out on me that morning. But it was my heart that was broken, not my toe."
* SoulSuckingRetailJob: Jack's position in the beginning. [[spoiler: He quits after deciding he prefers a life of adventure and intrigue]].
* StaringKid: There's one when Mr. Igoe shoots Ozzie with his gun hand.
* StrappedToAnOperatingTable: Jack is strapped to an OP table before getting Igoe injected into.
* StrippingSnag: Tuck gets into a fight with Lydia and runs after her onto the street only wearing a towel. The towel then gets stuck in a cab door and he ends up standing naked on the street as the cab drives away.
* StunGuns: Lydia tries to use one on Mr. Igoe. It backfires horribly.
* SwissArmyAppendage: The assassin Mr. Igoe is missing his right hand, and has it replaced with a system of different swappable false hands, ranging from an ordinary cosmetic hand, to one with [[ScaramangaSpecial a pointing finger]] [[ArmCannon that is actually a gun]], to a [[ThisIsADrill drill-hand]].
* TactfulTranslation: When Jack first tells the lab that Tuck is inside him, they start asking Tuck questions, which he can hear. But, of course, Jack has to repeat Tuck's responses. One lab guy assures Tuck that they will get him out and Tuck replies "You better, you two faced son of a..." and Jack repeats "He says thank you."
* TechnoBabble: The miniaturization process in the film is depicted as breaking up a macroscale object into its component molecules to "compile" a microscopic version of that object. The loss of so much of the objects mass is presumably the reason why Niles described the re-enlargement process as "tricky" and why two chips are used - one on the pod, one on the miniaturizer - as they can serve as a guide for exactly how to rebuild the object. So they're using a variation of [[Film/{{Tron}} Encom's scanning laser]].
* TemptingFate: Margaret's line "Don't worry. They won't know how to close it [the lid of the miniaturation chamber]." right before the heroes manage to do just that.
* ThereAreNoPolice: When Ozzie is running from Igoe in the mall, he is not looking for a security guard or yelling for help or going into a store and telling them to call 911. This would be an obvious RealLife course of action to take - however the [[TropesAretools trope is necessary]] to get Tuck injected into Jack.
* ThreeAmigos: Tuck, Jack, and Lydia, in a sense. Fitting that Martin Short is one of them.
* ToAbsentFriends: "We're going to make a toast to Ozzie, who saved my ass by injecting me into yours."
* TookALevelInBadass: Jack, oh so amazingly. So much so, that he rejects his old life at the end of the film in favor of rushing to help Tuck on his honeymoon against (presumably) "The Cowboy".
-->'''Jack:''' '''JACK PUTTER TO THE RESCUE!'''
* TravelingAtTheSpeedOfPlot: Despite 60,000 miles of blood vessels in the human body, forming a huge maze that goes through the heart every minute, Tuck manages to make his way around a human body pretty quick - ear, eye, abdomen, stomach, mouth. Zip-zip-zip. TruthInTelevision in that human blood makes that trip ''[[http://www.thenakedscientists.com/HTML/questions/question/3418/ every minute]].'' Tuck's just along for the ride.
* TrunkShot: At the end, we get a look upon the Cowboy from Victor and Margaret's POV in the trunk of the car.
* UnlikelyHero: Jack, being the RightManInTheWrongPlace.
* VanityLicensePlate: Igoe's BMW ("SNAPON")[[note]]This is a reference to Snap-on tools; an automotive mechanic tool that features a snap mechanism for different attachments, similar to [[SwissArmyAppendage his hand]].[[/note]] and Scrimshaw's Rolls-Royce ("SUB-ZRO").
* TheVoice: Tuck is this from Jack's perspective.
* TheVoiceless: Igoe never says a word in the entire film. Unless you count, "Arrrrrggggh!"
* WhatHappenedToTheMouse:
** By the end of the movie, all of the sensors Tuck implanted on Jack's body (and Mr. Igoe's damaged pod [[spoiler:and Mr. Igoe's remains]]) are still in there. Doesn't seem to bother anyone.
** What happened to the scientists who were in the miniaturization chamber with Scrimshaw and Canker?
* WhenThingsSpinScienceHappens: The miniaturization process at the government lab spins Tuck's minisub at absurdly high rates before breaking it down and shrinking it. It's a wonder Tuck's stomach didn't object.
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