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Waterfilter is the first episode of Ben 10.

Plot

Ben, Gwen, and Max arrive at Niagara Falls, where Ben is warned not to go into the water, as he can be a little bit 'reckless' in it. Gwen offers to be his 'filter' to tell him when one of his ideas is really terrible. Ben, however, wants to go by his "Ben-tuition" as he believes it can never go wrong. But on Grandpa Max's advice, he reluctantly agrees.

Later that night, Ben sneaks out of the Rustbucket as Cannonbolt and does a cannonball into the water, splashing a nearby fisherman and knocking a rock out of place, waking up a Hydromander. This Hydromander starts 'feeding' by eating everything around it.

The next morning, the din wakes Ben, Gwen and Max up, who see the rampage caused by the Hydromander. Ben decides to fight it using a new alien, Overflow, against Gwen's warning, and is ultimately being defeated. He goes back to the Rustbucket to complain, but meanwhile, the Hydromander finishes its feeding stage.

Ben and Gwen find it laying down, presumably sick, in the water. Ben does a victory dance at this, before its skin bubbles up, and it sinks beneath the waves only to be replaced by more, smaller Hydromanders. Ben, on Gwen's advice, transforms into Heatblast to fight them, but he is overpowered by them when they multiply faster than Heatblast can hit them. They end up throwing him into the water, where his powers are useless. Gwen admits her mistake and asks Ben to use his "Ben-tuition".

The Hydromanders are about to crush Ben with a rock, when he dodges and turns into Overflow and starts attacking again. In this time, Gwen discovers that they are weak on land, so she tells Ben to 'do what he always does' and Ben does a huge cannonball into the water, knocking out the Hydromanders from water onto land.

Later, the Hydromanders are locked up and Gwen apologizes for doubting Ben, who turns into Cannonbolt and does another cannonball into the water, soaking Gwen and Max, much to their disappointment.

Major Events

Omnitrix Alien Debuts

Character Debuts

Characters

Villains

Aliens Used

Trivia

  • It aired as the second episode in the U.S.
  • It was added to the Cartoon Network website as a sneak peek on February 22, 2017.
Ben 10 Reboot Episodes (U.K)
Season 1
WaterfilterThe Ring LeaderThe FilthFreaky Gwen BenTake 10Animo FarmClown CollegeSomething I AteRustbucket RIPBen 24hrsRiding the Storm OutThe ClocktopusGrowing PainsShhh!Brief Career of Lucky GirlAdventures in BabysittingSteam is the WordNeed for SpeedCutting CornersDon't Let the Bass DropVillain TimeBright Lights, Black HeartsRecipe for DisasterAll WetStory, BoredXingoDrive You CrazyHole in 10The Beast InsideTomorrow TodayForgetiScared SillyBad PennyMax to the MaxZombozo-LandDon't Laze Me, BroOmni-Tricked: Part 1Omni-Tricked: Part 2Omni-Tricked: Part 3Omni-Tricked: Part 4
Season 2
Out to LaunchCan I Keep It?Battle at Biggie BoxBon VoyageMayhem in MascotScreamcatcherVote ZombozoAnimorphosisThe 11th Alien: Part 1The 11th Alien: Part 2
Ben 10 Reboot Episodes (U.S)
Season 1
The FilthWaterfilterThe Ring LeaderRiding the Storm OutThe ClocktopusTake 10Growing PainsShhh!Brief Career of Lucky GirlAnimo FarmClown CollegeAdventures in BabysittingSomething I AteSteam is the WordThe Beast InsideAll WetVillain TimeDrive You CrazyTomorrow TodayStory, BoredHole in 10Recipe for DisasterRustbucket RIPFreaky Gwen BenBen 24hrsBright Lights, Black HeartsDon't Laze Me, BroDon't Let the Bass DropBad PennyZombozo-LandForgetiMax to the MaxCutting CornersNeed for SpeedXingoScared SillyOmni-Tricked: Part 1Omni-Tricked: Part 2Omni-Tricked: Part 3Omni-Tricked: Part 4
Season 2
TBA
Unknown
Out to LaunchCan I Keep It?Battle at Biggie BoxBon VoyageMayhem in MascotScreamcatcherVote ZombozoAnimorphosisThe 11th Alien: Part 1The 11th Alien: Part 2

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