"Crash" is the thirtieth episode of the Teen Titans series and the fourth episode of the third season.
When Beast Boy downloads a copy of the newest video game "Mega Monkeys 4", he goes to Cyborg's room to use it on his computer, but accidentally tries it out on his system recharger which infects Cyborg with a serious virus. The only person who can possibly fix him is none other than Gizmo. Gizmo claims that the only way to fix him is to go into his body and destroy the virus from the inside, but during the operation Cyborg breaks free and goes on a feeding rampage in the city. Gizmo and Beast Boy must now try to repair Cyborg from the inside before the virus spreads throughout the entire city.
Beast Boy has just hacked into the global network and managed to get an illegal advance copy of a new computer action game. But the Titans Tower's main video game and computer systems reject the copy, so Beast Boy sneaks inside Cyborg's room to use his computer. He makes the unfortunate mistake of uploading the game on Cyborg's System Recharger, and since he had deactivated the Titans' security programs to obtain the game, it has come with a computer virus as a nasty surprise bonus, which promptly infects Cyborg as he attempts to take a recharge.
With his brain addled by the virus, Cyborg throws himself at anything which appears edible in his mind's eye - including his fellow Titans. Beast Boy, feeling guilty, offers to make things right, but the others, feeling he has caused enough trouble already, do not trust him to succeed in such a delicate operation and "recruit" Gizmo instead. In order to erase the virus, Gizmo shrinks down to microscopic size and prepares to enter Cyborg's brain. But just as the injection is to take place, Cyborg breaks free and runs amok in the city. While Gizmo has been injected, he was inserted at the lowest possible end and so has to work himself up all the way to Cyborg's brain. Beast Boy, transformed into an amoeba, joins him, still determined to correct his blunder.
Robin and the girls attempt to restrain Cyborg, who runs through the city center, consuming any and every (in-)edibles that catch his eye. Finally, in his agitation, he begins to infect any other electrical device he touches with the virus - and his next target is the main dish of the city's communication center, which would spread the virus to every machine within 100 miles, thus making its elimination an impossible task.
Beast Boy and Gizmo finally reach the brain after passing scores of drones created by the virus. While Gizmo is prepared to use even radical methods to finish the virus - including setting an EMP charge that would shut Cyborg down, possibly for good - Beast Boy is determined to rescue his friend without harming him any further, but Gizmo is personally determined to eliminate his rival. The virus proves stronger than expected; Gizmo runs for it, and Beast Boy is caught by the virus. But then an idea hits him, and using an inherent ability of single-cell organisms, he overwhelms the virus by multiplying himself, eliminating its threat - just in time to reboot Cyborg's core systems, preventing him from biting heartily into the dish's antenna tip and Gizmo from activating the EMP charge. Beast Boy is lauded by the Titans for his success, but in the excitement of the moment, they have forgotten Gizmo, who has been expelled from Cyborg's body along with the remnants of the virus' drones and is still trapped in microscopic size in Cyborg's snot.
- At the end of the chase scene at the junkyard, the virus has Cyborg mistaken Starfire for a pineapple and Raven for a broccoli, and both girls run on foot. This is proven to be a little mistake since the girls can fly naturally.
- Raven would again state her sarcastic liking of waffles in "Cyborg the Barbarian".
- Beast Boy says that he downloaded the game copy from a server in Eastern Zandia. In the DCU, the fictional nation of Zandia was the birthplace of Brother Blood.
- When in the farmer's market, Cyborg throws multiple items into his mouth, one of them being a toy of Mumbo.
- With the exception of scaring Gizmo, Raven does not wear her hood throughout most of the episode.
- Even though Starfire alone was significantly stronger than Cyborg, the combined effort of Starfire, Robin, and Raven could not stop Cyborg.
- This episode's title song is sung in Japanese.
- Beast Boy's appearance as an amoeba means that:
- This episode establishes that he can transform into microscopic organisms (However, amoebae are not scientifically classified as animals).
- This is the only episode in which Beast Boy talks while in animal form, though he is seen communicating telepathically with Aqualad in "Deep Six" as a squid. This is also despite the fact that amoebae do not have vocal cords.
- This is the second time Raven scared her enemy to the point of traumatization since Dr. Light in "Nevermore".
- The blood cells that chase after Beast Boy and Gizmo are 3D animated. This is one of the few episodes to use 3D animation.
- After Raven's sarcastic remark, the Teen Titans discuss ways to fix him. During this scene, Cyborg can be heard in the background quoting a scene from the movie Shrek where Donkey talks about parfaits, except Cyborg replaces "parfait" with "waffles."
- This episode is a spoof of the films Fantastic Voyage and Inner Space and the ending where Cyborg sneezes both Beast Boy and Gizmo out is a spoof of The Magic School Bus.
- This episode is the reason why Cyborg is the "victim" of so many plots based on Fantastic Voyage in the DCU.
- Cyborg saying the word "Yams" repeatedly is a possible reference to the Spam sketch from Monty Python's Flying Circus.
- Cyborg bursting through the wall saying, "oh, yeah" is a reference to the old Kool-Aid commercials where the Kool-Aid Man would do the same. It could also be a reference to the old New Teen Titans anti-drug PSA where Cyborg bursts through a brick wall, fandubs of which have Cyborg say "oh yeah."
- The viral drones have a striking resemblance to Keramon from Digimon. They also have a similar appearance to the Nometian aliens in the Justice League episode "Comfort and Joy".
- Cyborg's "brain" (where the viral core is located) closely resembles the core of the second Death Star from Star Wars: Return of the Jedi.
- Cyborg eating the parking meter with the net resembles the Shrek scene where Shrek eats a bunch of spider webs (shaped like a turkey leg) on a stick.
- As Beast Boy tries to find the CD slot on Cyborg's system recharger, the "ZZZ" snores in the monitor appear to float off-screen.
- During the scene where Cyborg eats a payphone booth, a lamppost can be found erected in the middle of the road.
- A red globe on the satellite dish antenna did not appear until the scene when the Teen Titans enter the communication hub.
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