Grounded

Grounded is the twentieth episode of Ben 10: Alien Force.

Plot
While fighting one of the Highbreed, Ben's parents catch him transforming into Swampfire. They forbid him from using the Omnitrix after having proof of a black eye from the fight, forcing Kevin and Gwen to fight the DNAliens by themselves. After trying to sneak out as Echo Echo, Ben gets grounded and is made to spill the beans about Gwen, getting her grounded, leaving Kevin alone. Kevin's trouble with the DNAliens and the Highbreed eventually pushes Ben over the edge, and he breaks out of his house as Humungousaur in front of his parents to help. After a short battle aboard a small freighter carrying a rare isotope which the DNAliens plan on using, Ben's parents come to the rescue, admitting that they are proud of Ben and understand what he needs to do.

Major events

 * Ben's parents learn about Ben's life of fighting evil villains with the Omnitrix, and Grandpa Max being a Plumber.0123.jpgGwen_room.png

Characters

 * Ben (Main character)
 * Gwen
 * Kevin
 * Carl Tennyson
 * Sandra Tennyson

Villains

 * Highbreed
 * DNAliens

Aliens used

 * Swampfire
 * Echo Echo
 * Humungousaur

Quotes
Ben: You've got to listen. My friend is in trouble! I've gotta go help him!

Sandra: I don't wanna hear another word! You are not leaving this room! You are calling anyone, you are not IMing anyone, you are no texting anyone, you are not myfacing anyone!

Ben: Myfacing?

Ben: It's a sacred trust. I cannot diavoulge that information. Never, never, never!

Trivia

 * Even though it's shown that Ben and Kevin have still some rivalry going on, it's also shown that they both care equally about each other.
 * This is the official episode that Ben's parents find out about him being a Plumber. There was a lost episode that Ben's parents found out in the original series, but it involved Vilgax and it was non canon.
 * It appears that the Omnitrix aliens used in Ben 10 Returns: Part 1 have been repeated in this episode in the same order.
 * This is the episode where Ben answers his cell phone as an alien for the first time.
 * Sandra says about "MyFacing", possibly a reference to MySpace and Facebook. But, giving Ben's confused reaction, she might have mixed up the names.
 * The third hint towards the events of War of the Worlds is foreshadowed between the talk of Ben, Kevin and the Highbreed.
 * Gwen says about "Wifipedia" refering to Wifi and Wikipedia.
 * When Ben is explaining about the Omnitrix to his parents, he says the DNAliens are the ones who are planning to destroy Earth, but it is actually the Highbreed who want to destroy Earth, the DNAliens merely serve them. However, Ben could've just put them under the same group to make it easier on his parents.
 * For some odd reason, Ben doesn't use either Big Chill or Jetray to fly to (or TRY to go to) his friends, instead becoming the alien he plans to battle with and running/swimming to the scene, even destroying part of his room to do so.
 * Ben and Gwen have the same screensaver on their computers.