A collection of TBBT sci-fi. None of these stories are connected. They are all AU. It started with one little story, but my mind likes to wander.If you have any suggestions for more topics, PM me. :)

Short stories set in alternate universes about how Sheldon and Penny come together.

Leonard asks Penny to take care of Sheldon for the summer while he's gone, and after spending so much time together, Sheldon and Penny's friendship is tested, questioned, and strengthened. But something surprising is happening and they can't ignore it forever.

What happened after Penny took the guys to dinner the day they met? Let's find out, shall we? Au version of episode one.

NEVER trust Howard Wolowitz when he offers you a pill-Sheldon finds this out the hard way and Penny must help him with the afteraffects. Thanks to Jislane35 for the beta! (unbetaed from chapter 4 on).

It all started with a final strike, or Penny's blatant disregard to follow the rules. [ Dark, Smutty, Seriously rated M Shenny. ]

Sheldon is interrupted on a busy Saturday afternoon by Penny and the loud, country love song coming from her open apartment door, and it never occurred to him until now that she could be singing to him. *One-Shot*

M for a reason, warnings inside. Reviews welcome. A darker, more adult Big Bang Theory. What Sheldon Cooper wants, he gets, and he will get Penny. No matter what anybody says, including her.

Newly single Sheldon finds himself plagued by urges that were never there before and he discovers an unconventional way to cope. It isn't long before Penny finds herself along for the ride. *Rated M for sexual content and Dark Sheldon. If you can't handle the heat, get out of the kitchen*

Previous story-REPOST by me. Enjoy this DARK SEXY ONE SHOT. Penny's interest in Sheldon crosses over to obsession, primarily in the bedroom... ENJOY!

Sheldon knows things that others wouldn't believe, about himself, and his perky neighbor. But when She revamps her relationship with Leonard for the seemingly hundredth time, how long can he take it before he snaps? And more over, can he control the things he feels for her? Dark Sheldon, Smut, Language, deals with kinks, too. (Renamed.)

During a hot summer night, Sheldon's air conditioner is broken and he seeks more than cold air in Penny's bedroom.

Penny needs a change and decides to go to her whack-a-doodle neighbor for help. While assisting in the effort to 'better' her Sheldon unexpectedly discovers what life is all about.

Penny believes in magic. Sheldon is part of the reason why.

Takes place immediately following Penny singing Sheldon 'Soft Kitty' in the Vegas Renormalization. Penny allows Sheldon to sleep in her bed when he's locked out of his house, but sleeping Penny can be a dangerous thing, as Sheldon discovers. Rated M for sexual situations and language.

Shenny and what the tittle says. Dedicated to SunnyCitrus10. Smut.

After 6 months in Paris, Emily returns to find that the one person she didn't want to leave no longer trusts her. Will Friday Night Fix-It Night repair Emily's relationship with Spencer? And is there any way to fix the love and longing she feels for him?

Another installment in the "Alone" 'verse. Takes place several years later (after the Cooper-Kripke Inversion). Penny takes a very drunk Sheldon home after a university fundraiser. Rating is for sexual concepts, situations, and language.

Penny works in a brothel. She has a new client who is tall, lanky, super smart, and doesn't like being touched. What's a girl to do? I used the word brothel. I rated it "M". Do I really need to tell you there's smut inside? ;)

After Howard and Bernadette's wedding, Penny must face some hard truths and do some growing up of her own. Easier said than done. A series of unfortunate events can lead to the most fortunate of outcomes. S/P, L/A, H/B canon compliant.

Penny is fascinated by Sheldon's hands... Shenny if you squint. Now new and improved with a part 2 for all those that so sweetly asked-I made an exception to my rule about leaving a story alone. Please, enjoy!

She feels the ache for him, everyday, without fail, her body pines for him. Longs for him in a way that it doesn't for anybody else.

Penny is helping Leonard and Sheldon clear out their apartment. Sometimes saying goodbye is hard.

While cleaning, Sheldon discovers a box under Penny's bed that he probably should have never seen. PWP. Kink warnings inside.

Sheldon is confused. This time, Penny is the teacher. Set after the season 3 breakup. Disclaimer: I own nothing. I am humbled to borrow these characters and have some fun. Please read and review! Rated M for sexual content and language.

After he asks her for advice on how to take his relationship with Amy to the next level, Sheldon and Penny are drawn to each other. How far will they take their attraction, and how much will it cost them?

In the days after "Saturnalia Miracle 2008," Penny and Sheldon's relationship begins to change. They go with it. Rated for coitus; rating applies starting in chapter 11.

Penny and Sheldon are stuck in the elevator together. Their anger issues cause them to...overheat.

Porn w/ plot; NC-17. A case brings the team to Vegas and they go around strip clubs. Reid surprises everyone. Another case requires Emily and Reid to be undercover as a couple. Pretty much porn w/ plot - almost no crime - just a few words.

Penny and Leonard left LA for New York 5 years ago, but she misses her life in LA. Rated M for later chapters.

"Show me what you like," he said against her neck. She brought her eyes up to him and smiled... Some good Halloween themed sexy little story for the fun of it. Requested from & dedicated to: TJay M. ENJOY!

Everyone was so focused on Leonard's crush on Penny that her all-consuming crush on Sheldon goes unnoticed. When Sheldon finds out about her feelings, they go on an emotional and physical journey neither of them saw coming.

A missing scene between Sheldon and Penny before Amy arrived at 4B. References to 5x12 "The Shiny Trinket Maneuver."

Sheldon let Penny walk out of his life, with his unborn child. Now seven years later, Penny returns to Pasadena but she's not alone and Sheldon sees what could have been his, is there still a chance that it could be? I own none of the BBT characters!

Emily is innocently laying in bed when the fantasies begin to creep back up on her. What happens when her fantasy man appears? Will sparks fly or will she be too embarrassed to do anything? Birthday fic for LadyBelletrist!

Penny is getting married, there's just one problem. She's not in love with the groom, but the groom's best friend.

Sheldon is curious about human mating rituals.

"The bastard doesn't notice a thing, of course. Oblivious to what he does to her. " Angsty not so romantic one-way romance. Sex implied.

Sheldon and Penny are making chocolate covered cherries when education gets interesting... Dedicated to Medusa.

one shot, written for Medusa20. I'm not sure if it's what she wanted, but its what she asked for. Penny arrives at the university to pick up Sheldon one night, and finds him in the auditorium...

Summary: Following the abortion when she was a teenager, Emily pretty much avoided sex. Spencer wants to help end her sexual fast. Is it possible he's a tiger between the sheets? Slightly AU and OOC Reid/Emily smut.

Sheldon gets two tickets to a coveted event, but must bring a female...

Sheldon is Penny's responsible friend while she recovers from anesthia, with interesting results! Just a fluffy lil oneshot..

He is the last person she expected to bear ink on his body. It's just the first in a series of unexpected discoveries Emily makes about Reid. Prentiss/Reid. NOT connected to "How to Fight Loneliness."

Sheldon wakes up to a problem. SHELDON/PENNY

TPP-verse. Gratuitous fan-service ahoy! This is Jim Parsons' fault for suggesting that Sheldon get ripped. Happy Christmas, Paradox People. :

Written for the kink meme on Paradox. There's a break-in at the guys apartment and Sheldon is hurt. Penny makes him feel better. Rated M for sex and bad language.

Sheldon watches as Penny and Leonard self-destruct...

Sheldon Cooper finds out that he's not always a creature of habit, all he has to do is banish a certain someone to find out. This is my take on what should have happened during The Panty Piñata Polarization.

Penny goes to 4A to spend a night of passion with Leonard...and finds out she had made a mistake.

Penny and Sheldon, one shot smut in a car park. That's about it, really. Missing scene from The Grasshopper Experiment. Just written and posted, sorry for any mistakes...

and 1 time he returns the favor. Written because I apparently smoke a lot of crack.

A misunderstanding leads to a very passionate encounter between Reid and Emily.