CHAPTER 1

Disclaimer: I do not own Ben 10 or The Big Bang Theory.

In this fic, TBBT characters are 18 year olds.

Benjamin Kirby Tennyson, 18 year old superhero, wielder of the Ultimatrix, is seen sitting in a Mr. Smoothy outlet, in his hometown, Bellwood. He has saved the Universe countless times from destruction. He works with his cousin Gwen Tennyson, who is also 18 years old. She is one-quarter Anodite, a species comprising of energy beings, that can manipulate mana. Another member of this team is Kevin Levin, half human-half osmosian hybrid, who can absorb energy and use it as a weapon. These three together have gone on lot of dangerous missions, and come out successful.

Currently, Ben is sipping on his smoothy, completely bored out of his mind. After defeating Diagon, the Earth is a very peaceful place. The robberies and other smaller local problems are taken care of by the Plumbers. Not that he isn't happy about it. He just doesn't know what to do.

"Oh my god! I am soo bored. If something happens, I am gonna take the chance.", he groaned.

Just then, as if the Universe had heard what he said, a portal opened up and started sucking him into it.

"Aaaahhhh! Why does this Universe hate me!?", he exclaimed. He didn't know what to do. He was holding on to the bench. Just when he was about to get sucked in, a hand caught him. He looked up to see Gwen holding onto him, gritting her teeth, trying to pull him, but the portal proved to be stronger and sucked them in.

Out of the shadows, a teenage girl who looked about 18 years old, having grey hair, tied up in a ponytail, and a purple dress, came out laughing evilly. She was Charmcaster, a sorceress, and Gwen's archenemy.

"At last! I have removed those two pests out of my way. I will conquer this universe and rule it. There won't be anybody to stop me! HAHAHAHAHA!" she started laughing madly._

At Penny's Apartment, Pasadena, LA

Penny was sitting on the couch reading a magazine, with the TV on on the side. She had taken the day off, because she had been working continuously for two weeks without she had college to attend to. Her feet were aching and her body felt sore. She just wanted a day to relax. However, she just couldn't catch a break! There was the trademark knock on the door, which she knew all too well about.

"knock knock knock Penny, knock knock knock Penny, knock knock knock Penny"

Penny groaned. She didn't want to let him in. She just waited so that he may think she is not there at home and go away. However, that didn't happen.

"Penny, I know you're in there. I could hear you groaning. You can't fool me you know.", he said through the door.

Penny sighed, "Damn his vulcan hearing! Come in, Sheldon. It's open."

Sheldon opened the door and came in. He was wearing his Flash T-shirt.

"What do you want Sheldon?", she asked him exasperatedly.

"Leonard is refusing to take me to college. He says that he is too tired. Geez, for an Experimental Physics student he sure is lazy.", he said.

She sighed an pinched the bridge of her nose, "What do you want me to do about that?"

"He always seems to be brisk after having coitus with you.", he said suggestively.

"WHAT!? Sheldon, I am not gonna have sex with him just because he won't take you to college. Besides, we are broken up."

"Oh come on. I am already late. I would have asked you, but, you don't play any games on the way and once you threw me outta your car.", he said the last part a little lowly.

Penny just groaned and grunted in response. Her day off was ruined. She was about to get up when a portal opened over her head and two figures came out of it. It closed immediately.

Penny shrieked as Ben fell on top of her, while Gwen just fell on the other end of the couch. He slowly stirred as he felt comfy for some reason. He opened his eyes to see the most beautiful girl he had ever seen. She had green eyes, blonde hair and a curvaceous hourglass figure. He slowly got to his feet and helped Gwen up.

Penny started freaking out. She didn't know were these people came from. But when she looked at the guy who had fallen outta the portal, she felt her cheeks heat up. He was a very handsome guy, with wonderful emerald eyes, a lean muscular figure, with brown ruffled hair. He was about her height, maybe a little taller.

Gwen broke the silence by asking Ben, "Are you OK?"

"I'm fine Gwen. But where are we? And how did we get here?" he replied.

They both looked at Penny, who was staring intently at the two. She didn't know what to think. Two people just popped out of nowhere. She was snapped out of her musings when Ben spoke up.

"Excuse me, my name is Ben Tennyson, and this is my cousin, Gwen Tennyson. Can you tell us where exactly we are?", he asked.

Penny replied a couple of moments later, "Pasadena, LA. Who are you? And how did you get here?"

Ben blinked twice before saying," Well we just introduced ourselves to you. And as for the second question, It's a long story, but the shorter version is that we are not in our world."

"What does that mean?", she asked readying her bat.

"Whoa!Whoa!Whoa! Hold on for a moment. We won't harm you. We are from another Earth similar to this one. Only difference is that we do not exist here.", he explained.

Penny could not believe her ears. She started thinking these people were nuts. Then suddenly she fell unconscious. The last thing she remembered before completely blacking out is that the two people were helping her up.

TO BE CONTINUED...

Thats it folks. This the first BBT and Ben 10 crossover published so please READ AND REVIEW.