It is revealed that the modified Omnitrix has a weakness. Whatever damage Ben takes in an alien form is carried over to his human form. An example was when Humongousaur hurt his knee. When Ben turned back into his normal self, his knee was still hurt.
When Kevin defeats some of the DNAliens on his own and piles them up, their eyes are pushed inward into their heads.
When the DNAliens stuck Humongousaur's arm on the floor with their slime, he wasn't able to free himself from the slime. Instead, he lifted his giant hand and took a piece of the floor with it.
The Highbreed Leader has some sort of wings, and the Highbreed Commander doesn't.
After Humongousaur grows a couple of feet and he's seen running toward the Highbreed ship, Gwen and Kevin have no eyebrows, eyes, nose, or a mouth. Same when Ben reverted to his human form when he was laying down he had nothing on his face.
When the deadly beam from the Highbreed Ship is released, it instantly throws four cars into the air. Once thrown, the cars vanish in a split second.
While Gwen is fighting the Forever Knights in the castle by herself, she defeats 11 of them. Then when they show her in the center of all the knights she defeated, there are way more than 11.
When Ben first turns into Humongousaur he has no spikes on his back, but when he changes size you can see rock like things on his entire body.
In the flashback of Ben riding his bike, it's sunny outside and the sky is blue. Seconds later when Ben is only a few feet from Grandpa Max, the sun sets and the sky is orange. Furthermore, Max's hair is too grey for a flashback of about ten years prior.
One of the Forever Knights fights with a sword, instead of a lance.
When Ben, Gwen, and Kevin walk into the castle, the dragon appears to be a metallic statue in the background.
Ben never refers to how his parents are going to react to not only him putting the Omnitrix back on, but also leaving to fight aliens. He's only 15.
Ben said that he scraped his knee, but if you look close, you notice that the injury is actually just below the kneecap.
Humongousaur: (about to fall) Come on, come on, come on! (Humongousaur falls; Ben reverts back)
Ben: Not fun.
Forever Knight: (points sword at the team) Nobody move! Hands on your head.
Kevin: Make me! (absorbs stone from wall)
Ben: (talks to Kevin) Listen. We've had a lot of problems in the past, but I wanted to say thanks. We wouldn't have made it without you! (Ben extends hand but Kevin ignores it)
Kevin: You still won't make it without me. (Ben lowers hand)
Gwen: Are you saying you want to help us?
Kevin: I'm saying I made somebody a promise. I'm seeing this through to the end.
Ben: Then you can shake hands right? (the three of them put their hands together) It's hero time!
Kevin: (talks to Ben) So what happens now?
Ben: We keep looking for Grandpa Max. The best way to do that is to solve the case he was working on!
Gwen: Easy as pie! Anybody know how to make a pie?
Kevin: (going down by elevator) Not much to see down here.
Ben: (they all see the Highbreed spaceship) Don't think so?
Kevin: (shocked) It's big!
Ben: It's the mothership. Don't you get it? Grandpa Max has to be in there!
Ben: I'm going to need help.
Gwen: You know I'm here for you.
Ben: Kevin, there's no money in this but...
Kevin: (takes Magister's Plumber badge) ...I'm in!
Gwen: Weapons room?
Kevin: Yep! (Gwen destroys all the weapons)
Ben: A little louder, why don't you?
Kevin: No big deal. We'll be out of here before they even... (army of DNAliens appear)
Ben: You were saying?
Magister: Your Grandpa was on the trail of something big. An alien conspiracy, with earth in the middle. He was working undercover. If you crack this case, maybe you can find Max and save your planet.
Ben: I can't do it without Grandpa. I don't know how.
Magister: (puts his hand on Ben's shoulder) You... you are Ben Tennyson. You can do anything... (Magister dies, and his suit falls to the floor)
Echo Echo: (talks to Magister) Hey, are you okay? There's...(Ben turns back into his normal self)
Ben: ...water leaking out of your suit.
Magister: (touches the dripping liquid) That's not water.
Forever Knight: (Kevin holds two Forever Knights head to head) Oh, you're not gonna...
Kevin: Yeah, I am! (headbutts the two knights together)
Highbreed Commander: (after trying to hit Humongousaur) Filthy creature, Hold still!
Humongousaur: Why would I do that?
Kevin: We kick butt!
Humongousaur: So far... but there can be hundreds of these guys in here.
Gwen: We destroyed the weapons, why not just leave?
Humongousaur: Good call! Lets... (Highbreed Commander walks in)
Magister: (head of a Forever Knight comes rolling past Magister and Kevin) That's why level five technology is illegal on earth! Humans aren't ready for it.
Magister: (yells at Forever Knight) Don't do it, it's busted! (Knight fires lance; lance implodes)
Highbreed Commander: I do not repeat myself to lower life forms.
Kevin: Did you just call me a lower life form?
Humongousaur: I'm pretty sure he did!
Gwen: And while he may have a point. it's rude to say so.
Highbreed Commander: (yells at the team) What are you creatures doing on my ship?
Ben: (Gwen and Kevin come sliding down the crater) How'd you find me?
Kevin: Looked for the front end of the trench you dug with your face!
Gwen: You okay?
Ben: Humongousaur skinned his knee and it was still skinned when I turned back!
Highbreed Commander: (talks to Humongousaur) You've ruined everything by discovering this location. You've sent our plans back months. Inferior scum, I have to move my ship, and find a new hiding place. I'll have to sterilize the area!
Humongousaur: Huh? Sterilize?
Highbreed Commander: Destroy all life within 5 miles of here! No witnesses will live to tell the tale.
Humongousaur: (angered) You can't!
Highbreed Commander: (picks up Humongousaur by the neck) I can, and I will!
Kevin: (Echo Echo creates sonic boom) You can warn someone when you do that!
Gwen: Seriously. I have earplugs in my purse.
Echo Echo: Sorry!
Kevin: (Ben knocks down some stuff in the castle) Come on man. What are you doing?
Ben: Sorry I guess I'm just a little... (Dragon rises) paranoid!
Kevin: (refers to the Highbreed Commander) Did he hurt you?
Kevin: Well, I'm going to hurt him! (lifts his metallic fists up and prepares to fight)
Humongousaur: He's too strong. I'll hold on, you guys get outside.
Gwen: I'm not going to let you fight that thing by yourself!
Humongousaur: No time to argue! Kevin get her out!
Kevin: You heard the man.
Gwen: Let me go!
Kevin: Not until we get off this ship!
Kevin: (Magister saved his life) I owe you one.
Magister: Yeah, you do!
Ben: Training wheels are off you guys. It's time to finish the mission.
Highbreed Commander: You vermin would dare mock a Highbreed Commander?
Humongousaur: I'd mock anyone who uses the word "mock"!
Kevin: (about the DNAliens) Save some for me. Those creeps cost me a major payday.
(Gwen looks at him)
Kevin: Also because they're evil, and we're against them.
Ben: (after disguising himself as a DNAlien) How do I look?
Kevin: About the same... taller?
Ben (as Humongousaur): Guess what time it is? It's hero time!
Echo Echo: Got you. Got you. Got you. (thrown across room) Don't got you. (hits wall)
Other Echo Echos: Ahh! (hits wall)
Gwen: Follow me.
Kevin: (from car) I'll follow you anywhere.
(goes through rocky area)
Kevin: Except there! Come on Gwen, paint job!
Echo Echo's first appearance in the series.
Humongousaur's first appearance in the series.
DNAliens, Forever Knights, and the Highbreed Commander.
Gwen has the ability to sense who has been in a certain area. She used this ability to try to see if Grandpa Max was in the Highbreed ship.
This marks the first time in either series where Ben is referred to as "Ben 10". The Highbreed leader calls him this.
Echo Echo - Alien Bio:
Echo Echo uses the power of ultrasonic waves to thrwart his enemies. He also has the ability to duplicate himself. Being the master of sound, what more would you want to hear?
Humongousaur - Alien Bio:
Humongousaur literally has no projectile weapons of any sort, just bare brawn and all alien muscle. He has the ability to transform himself up to 60 feet, and has the strength to crush anything in his path.
This episode aired at the end of Cartoon Network's "Ben 10 Week" special, a promotional period occurring between April 13 to April 18, 2008.
Alien Form(s) Used:
1) Echo Echo
Allusions from Previous Aliens:
Echo Echo seems to be a combination of Ditto's duplicating ability with Benwolf's sonic howl.
Humongousaur seems to be a mix of Four Arms (reckless brute strength) and Way Big (growing).
Highbreed Commander - Appearance:
The Highbreed Commander looks very similar to the Locrix from Teen Titans.