AN:Hey this idea popped into my head when, you guess it, I was coming home from seeing Young Frankenstein so very long ago. I started writing this fic after I first saw the show like two years when the complete original cast was still there. I only never posted till now cause this fic wasn't my top priority fanfiction wise. I decided to wait until I had written out a good amount of it, which I do I think I have about half already finished. And by the way, I don't think there's a Young Frankenstein catagory so I couldn't put this in both catagories like I had planned with the crossover feature. But its still a crossover.

Warnings: None really. Spoilers for Young Frankenstein, I suppose some cursing, sex references and stuff but nothing bad…

Disclaimer:Seriously people… if I owned YF or TBBT I don't think I'd be writing fanfiction about it.

Shipping: Let me rant for a moment here, what's with all the Sheldon/Penny? Does no one appreciate a good Penny/Leonard? Not that I have anything against Sheldon/Penny but I mean… you'd think there'd just be more Penny/Leonard. But anyway, this story will be a Penny/Leonard ship cause I want them to hook up! … for more then like, one episode.

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Leonard walked up the many flights of stairs and to his apartment, the elevator had been broken for Lord knows how long now, but no one seemed to mind, or they were just too lazy to complain. He had gone down to fetch his mail quickly, he was off work today and found himself quite bored, the equations that were on his white board weren't occupying his time the way they normally did.

He opened the door to his apartment and flopped down on the couch, long ways on his back with one foot propped up on the arm. He absent mindedly flipped through his mail, bills mostly, a robot magazine for Sheldon… he stopped for a moment and stared at a hand addressed envelope it was defiantly personal but it wasn't addressed to anyone he knew.

"Inga?" He mumbled and sat up slightly. His gaze wandered to the address and noticed it was Penny's. "Who's Inga?" For a moment he thought maybe Penny had another relative staying with her or another friend but then he thought that he would have heard about it if she did.

He heard the door from Sheldon's room open and his quick steps as he walked out. Leonard automatically sat up to allow Sheldon sit in his usual seat; he knew he would make a fuss if he couldn't. He continued to stare at the unusual letter as he felt Sheldon it down in his normal seat next to him with a glass of milk in his hand.

"What are you looking at?" He asked as he sipped his milk.

"This letter," he began to explain. "It's Penny's address but it's addressed to a woman named Inga, and it doesn't even have a last name, just Inga."

"It is conceivable that she could change her name."

"To Inga?"

"Point taken." Sheldon shrugged. "Why do you care anyway? It's not your letter just give it to her."

He was about to respond when there was a soft knock at the door. Out of reflex he placed the mail on the coffee table, stood up and walked over to it, he opened the door and by pure coincidence there stood Penny with a few letters in her hands sucking on her tongue. "Hey," she greeted and glanced down at the letters. "I got some of your mail… again, ya know we should really talk to that mail guy."

"I wouldn't worry about." He said taking the mail and letting her in. "Speaking of which I think I got something of yours."

He walked over to the table and picked up the letter. "Is this for you?"

She took it from his hands and moaned loudly when she saw it. "Oh God…"

"What is it?" He asked.

"It's from my grandma; she calls me Inga, my middle name, been in the family for generations, from someone's Godmother or… something, I dunno." Penny said rolling her eyes. "She has yet to master the concept of e-mail."

"Inga's a German name." Sheldon pointed out.

"That would make sense seeing as I am German and I swear if you two tell anyone what my middle name is I will hunt you down and kill you." She warned.

"Well what a coincidence, Leonard refuses to let anyone know his true name as well." Sheldon said sitting down once again with his milk, testing it to make sure it was still cold enough to drink.

"Leonard's not your name?" She asked.

"No… no it is…"He said wringing his fingers together nervously.

"Then what?" She asked and he remained silent. "Oh come on, you know my secret shame now let's hear yours."

"It's his last name; he goes by his mother's maiden name. It's really Frankenstein." Sheldon practically shouted out, getting sick of Leonard's refusal so say.

"Frankenstein? Like the monster?" Penny asked with a smile.

"Actually Frankenstein was the Doctors name, the monster was referred to as Frankenstein's Monster or Creature." Sheldon said helpfully.

Leonard glared at him before turning back to Penny. "It's Fronkensteen actually, my name is pronounced Fronkensteen. And yes the whole world knows what my ancestors have done, but I'm not like them, I'm not a Frankenstein, I don't indulge in tomfoolery and I don't believe in ghosts or goblins."

Penny scoffed "But you have to, I mean it's proven that it's possible to bring live into something dead sure most people don't beleive it but I happen to be one of the few who do."

"I'm not denying that it happened, I'm just saying do I look like the kind of mad man who goes around digging up freshly buried corpses?" He asked.

"Well…" Penny shrugged.

"Don't answer that." Leonard said holding up his hand. "I'm not a Frankenstein."

She sighed. "Whatever, look guys I gotta go, I have a date tonight, talk to ya later." She said waving her hand and walking back out the door.

"Well, that went well." Sheldon said from the couch.

"Shut up…" Leonard moaned as he walked over to lose the door that Penny left ajar on her way out. As he reached the threshold on the door he saw her pretty face pop back in grinning.

"Have a good evening, Dr. Frankenstein." She said mockingly before running off back to her apartment.

"Don't call me that!" Leonard screamed as she shut her door across the hall before he grunted in frustration and shut his. He held his back to the door and crossed his arm while Sheldon sat on the couch watching him.

"I don't see why you just won't accept your family is full of insane but yet brilliant men." He said placing his milk glass down on the table.

"But I don't do all that stuff, I deal in fact, not fiction, I'm a Physicist for Pete's sake, it's the reason I exist."