Whenever someone decides to make an invention, they usually don't get it right [[FlawedPrototype the first time]]. Sometimes, it may result in {{Super Prototype}}s that have to be scaled down and depowered for easy mass-production capacity. Other times, it may go wrong. [[GoneHorriblyWrong Horribly, horribly wrong,]] resulting in a string of machines ending in Mk. VIII, Mk IX, until it's finally (relatively) safe. Then, when someone shows you the Mk. X, you ask [[FridgeHorror what happened with 1-9?]]

And there you have the Unseen Prototype(s). They are rarely mentioned in story, but come to mind once you realize that to get this far in an invention, there had to have been a lot of failures.
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!!Examples:

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[[folder: Anime and Manga ]]

* The first time one of [[MadScientist Dr. Gero's]] creations appears in ''{{Dragonball}}'', it's Number 8. The next time one shows up, he's gone all the way up to 17. (An {{Omake}} illustration shows the fate of the numbers in between--most of them were failures or considered too uncontrollable.)
* The title character of ''Yuria100Shiki'' is her inventor's 100th attempt at creating a SexBot. A few early models appear, including a crude inflatable doll.
* Averted in GaoGaiGar. While Mic Sounders the 13th might be the one with the most personality, we eventually do get to meet the other 12.

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[[folder: Comics ]]

* Machine-Man in MarvelComics, also known as "X-51" or Aaron Stack (made famous by ''{{Nextwave}}''). We never really find out about the previous 50, though ''Nextwave'' shows a joking page about one of his predecessors who is a partly-human looking killbot who happens to be employed as a priest. Somehow.
** The original prototypes all suffered mental breakdowns. The reason? They had human-level potential but were treated as mere machines. Only their creator realized this so he took one home and treated it ''as a person''. This is the one who became a superhero. (This is from the original story, not [[CanonDiscontinuity Nextwave]].)
* Marvel's Canadian government SuperTeam ComicBook/AlphaFlight has three training levels, the other two named appropriately Beta and Gamma. Gamma trainees graduate to Beta and then to Alpha. Though Beta eventually [[FaceHeelTurn went rogue]].

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[[folder: Film ]]

* ''Film/Plan9FromOuterSpace''. What were the first eight plans?
* In ''Disney/LiloAndStitch'', Stitch is Experiment 626. Most of the previous 625 experiments are never seen, although some of them do make an appearance in [[WesternAnimation/LiloAndStitchTheSeries The Series]].
* The Time Machine in ''MeetTheRobinsons'', which has had several failed prototypes, one of which looks like a Dali painting, and the Mark I which has only a single screw left.
* [[AustinPowers Doctor Evil]] calls his TractorBeam "Preparation H", as preparations A-G were complete failures. Of course, this is all to set up yet another joke for Scott to laugh at.

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[[folder: Literature ]]

* ''PerdidoStreetStation'': In his research on flight, Isaac comes across mention of Calligine, a [[BodyHorror Remaker]] who managed to graft functional bird wings onto his back. He notes that there had to be a lot of tests on criminals to get all the nerve endings and such right.

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[[folder: Live Action TV ]]

* ''Series/StarTrekTheOriginalSeries'' episode "The Ultimate Computer". Doctor Daystrom comes aboard to oversee tests of his M5 computer.
-->'''Kirk:''' I'm curious, Doctor. Why is it called M-5 and not M-1?\\
'''Daystrom:''' Well, you see, the multitronic units one through four were not entirely successful. This one is.
-->And later on, after it starts malfunctioning...\\
'''[=McCoy=]:''' The M-1 through M-4, remember? Not entirely successful. That's the way Daystrom put it.
* In ''The Dr. Steel Show'' Episode 2, DoctorSteel calls his hamster, "Hamster 65". In Episode 1, he had a previous hamster "experiment" (referred to elsewhere as Hamster 42), which had died. One wonders what happened to all the other ones?
* ''Series/BabylonFive''. We do eventually find out what happened to Babylons One through Four.
** Actually, the question is asked during the pilot movie, and Sinclair replies that 1-3 were sabotaged, and 4 disappeared 24 hours after coming online. Not much more is revealed about the first 3 stations, but the reasons for 4's disappearance form a major plot arc.
* ''Series/TheBennyHillShow''. Benny (as Fred Scuttle) is displaying his homemade, backyard rocket in which he plans to fly to the moon.
-->'''Scuttle:''' May I present... ''Indestructable the Second''!\\
'''Interviewer:''' What happend to ''Indestructable the First''?\\
'''Scuttle:''' It blew up.
* Whisper 115 of ''TowerPrep'' seems to have a lot of these-such as the psychotic Whisper 023. What happened between 23 and 115? What happened ''before 23?!''

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[[folder: Tabletop Games ]]

* [[HyperspaceIsAScaryPlace Hyperspace travel]] in ''{{TabletopGame/Warhammer 40000}}'' basically consists of tearing a hole in a reality, and sending a ship barreling through a Hell in space, where nightmares, Daemons, or any number of horrific things can end you. [[AndIMustScream Or not end you.]] And according to a bit of fluff, out of all the Hyperspace methods, ''it's the best option''. One must wonder what the early versions were like...
** Well the Tau Empire's version (essentially travelling in a boundary region between Hyperspace and Normal Space) might be one example. It's actually safer and more reliable but very slow.

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[[folder: Video Games ]]

* The previous tests of the teleporter in ''VideoGame/{{Half-Life 2}}''. "What cat?!" Though, things don't go quite as planned with it even when it is seen.
* Subject Delta of ''VideoGame/{{BioShock|2}}'' already qualifies as a SuperPrototype, but the name "Delta" implies that there were three before him. Knowing what the people of Rapture were screwing around with, it couldn't have been pretty.
* There have been at least 13 Murakumo units produced in ''VideoGame/{{BlazBlue}}''. Only the 13th, 11th, and 12th ever appear on-screen.
* Proto Man is the prototype (hence the name) for VideoGame/MegaMan, who remained unknown until VideoGame/MegaMan3. He apparently ran away for no particular reason, to which Dr. Light made Mega a "sister," Roll to keep him from running away. Proto Man needed a friend, apparently. Proto Man is also described as the prototype for an annoying enemy which is in nearly every game in the classic Mega Man series, the Sniper Joe. Proto hates 'em.
* Subverted with the [[SuperSoldier Spartan]] [[PoweredArmor MJOLNIR Mk V armor]] in ''VideoGame/{{Halo}}''. ExpandedUniverse materials reveal that the Mks. I through IV worked perfectly fine, with the V simply being an upgrade. The JustifiedTutorial of the second game is the Master Chief going through a checkup to make sure that everything in the new Mk. VI is working properly, and the Spartans in ''Halo Wars'' wear Mk. IV.

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[[folder: Webcomics ]]

* In ''SluggyFreelance'', this is a frequent joke about Riff's robots. First there was Mark I ([[MundaneUtility which he built to do his laundry]] [[ThereIsNoKillLikeOverkill but was nevertheless capable of taking on an army]]), then Mark II (which fought [[AxeCrazy Oasis]]). Then Mark V (which fought [[DemonicPossession a possessed Gwynn]] and [[MegaCorp Hereti-Corp]]); Riff doesn't want to talk about [[NoodleIncident Mark III and IV]]. After the robot's long absence from the comic, Riff revealed ''Mark XVII''. We don't know much about the intervening models, save that one of them was made of ''cheese''.

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[[folder: Western Animation ]]

* On ''MyLifeAsATeenageRobot'', we actually do find out what happened with [=XJs=] 1-8.

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[[folder: Real Life ]]

* RealLife: WD-40, which stands for "Water Displacement - 40th Attempt."
* Formula 409. So named because it took the inventors 409 tries to get the formula right.
** One of their TV ads makes fun of this by showing a "Formula 410" prototype: it melts right through walls.
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