Big Bang Theory
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The Fairy Tale Theory
by HelenaHermione reviews
"I'm looking for Penny Swan." The boy said. What happens when the cast of the Big Bang Theory gets involved in Once Upon A Time.
Crossover - Big Bang Theory & Once Upon a Time - Rated: T - English - Humor/Mystery - Chapters: 4 - Words: 13,234 - Reviews: 2 - Favs: 2 - Follows: 1 - Updated: 11h ago - Published: 3/1 - Leonard H., Sheldon C., Penny, Henry Mills
The Borrowers Big Bang
by peppybigbang reviews
After thinking about running away and accidently drinking a potion which turns him into a nine year old human little boy, he runs into familiar characters we all know and take him in. As if that not enough he is being chased by his enemy Ocious P.Potter!
Crossover - Big Bang Theory & Borrowers series - Rated: T - English - Hurt/Comfort/Friendship - Chapters: 1 - Words: 342 - Reviews: 2 - Published: 3/8 - Sheldon C., Rajesh K., Howard W.
The New Guy Theorem
by Autistic Writer reviews
When Freddie moves to Pasadena in order to move on with his life. He meets a group of familiar nerds who might make his stay much easier.
Crossover - iCarly & Big Bang Theory - Rated: T - English - Friendship/Romance - Chapters: 1 - Words: 1,442 - Reviews: 1 - Favs: 1 - Published: 3/7 - Freddie B., OC
Three Doctors & A Detective
by TheShamyFan123 reviews
While working abroad, Sheldon & Amy meet Sherlock & Molly. Amy works in the lab with Sherlock & Molly while Sheldon lectures at the University of London. Soon, murderous things begin to happen at the University. It's up to Sherlock and the rest to solve the case. Romance and friendships develop along the way.
Crossover - Big Bang Theory & Sherlock - Rated: T - English - Romance/Drama - Chapters: 2 - Words: 3,312 - Reviews: 3 - Favs: 3 - Follows: 6 - Updated: 3/3 - Published: 3/2 - [Sheldon C., Amy Farrah Fowler] [Sherlock H., Molly Hooper]
The Red Dawn Complication
by seniorcopycat reviews
Every day we go about our everyday lives, completely unaware of the forces that threaten our freedom. And when a unexpected foreign enemy attempts to invade the American and beyond our quirky group of scientists and their girlfriends must toughen up, stand up for America and fight back against these foreign bullies like real life heroes. Rated T for character deaths. R&R Please.
Crossover - Big Bang Theory & Red Dawn - Rated: T - English - Humor/Angst - Chapters: 4 - Words: 4,879 - Reviews: 10 - Favs: 1 - Follows: 6 - Updated: 2/28 - Published: 11/1/2013 - Leonard H., Sheldon C., Penny
The Face in the Crowd
by patricia51 reviews
Tim McGee lost the love of his life to a terrorist attack just as he finally acknowledged how much he cared for Delilah Fielding. But has he? Meanwhile an attractive grad student named Alex Jensen has just gone to work for Doctor Sheldon Cooper at CalTech. Will their paths cross? Well of course! Crossover NCIS/Big Bang Theory. Tim and Delilah/Alex.
Crossover - NCIS & Big Bang Theory - Rated: T - English - Romance/Drama - Chapters: 3 - Words: 6,122 - Reviews: 2 - Favs: 2 - Follows: 8 - Updated: 2/23 - Published: 2/1 - Tim M., Delilah F., Alex J.
The Fresh Theoretical Physicist of Bel-Air
Sheldon and the gang head over to the Bel-Air mansion for a visit.
Crossover - Fresh Prince of Bel Air & Big Bang Theory - Rated: T - English - Humor - Chapters: 1 - Words: 423 - Published: 2/22 - Leonard H., Sheldon C., Rajesh K., Howard W.
from NY to LA
by lovemelovemenot92 reviews
Santana, Rachel and Kurt move to Pasadena. Rachel has a part in a play.
Crossover - Big Bang Theory & Glee - Rated: K+ - English - Romance/Humor - Chapters: 2 - Words: 1,161 - Reviews: 1 - Favs: 2 - Follows: 6 - Updated: 2/22 - Published: 12/29/2013 - Leonard H., Penny, Rachel B., Santana L.
Leonard and Tori
by Erik9393 reviews
This is something I thought of myself. Tori Vega graduates Hollywood Arts and moves into an apartment one story above Leonard's and Sheldon's apartment. This is what I call a Lori pairing (Leonard and Tori) I do not own the Big Bang Theory or Victorious.
Crossover - Big Bang Theory & Victorious - Rated: T - English - Friendship - Chapters: 6 - Words: 2,797 - Reviews: 1 - Favs: 2 - Follows: 1 - Updated: 2/18 - Published: 2/10 - [Leonard H., Tori V.]
Big Bang Theory: The Werewolf experiment
by nobleboivin reviews
Lydia decides to visit her cousin in Pasadena during spring break and she ends up dragging her friends along. Giving the same rating as Big Bang Theory and Teen Wolf just to be safe. Pairings are Penny/Leonard, Scott/Kira, Allison/Isaac and Lydia/Aiden. Betad by Edanacat.
Crossover - Big Bang Theory & Teen Wolf - Rated: T - English - Chapters: 1 - Words: 951 - Reviews: 5 - Favs: 2 - Follows: 8 - Published: 2/16 - Penny, Scott M., Allison A., Lydia M.
The Avengers Theory
by StardustOwl reviews
10 year olds Raj, Sheldon, Leonard and Howard have always wanted to meet superheroes. Penny-not so much. They each meet a member of The Avengers and get sucked into a parallel universe. How will they cope when they realize that heroes exist and that someone is trying to kill them? Psychopaths are better than playground bullies though, right? Contains all Avengers characters too.
Crossover - Big Bang Theory & Avengers - Rated: T - English - Friendship/Adventure - Chapters: 7 - Words: 12,278 - Reviews: 3 - Favs: 3 - Follows: 4 - Updated: 2/15 - Published: 12/23/2013 - Leonard H., Rajesh K., Black Widow/Natasha R., Hawkeye/Clint B.
The Environment Exchange Paradigm
by BadWolfz reviews
What happens when Penny and Sheldon find a blue box in Sheldon's living room? And what happens when the Doctor and Rose are stuck in Pasadena with a bunch of nerds? Only one way to find out... (10/Rose and Shenny)
Crossover - Doctor Who & Big Bang Theory - Rated: T - English - Adventure/Romance - Chapters: 30 - Words: 68,670 - Reviews: 116 - Favs: 34 - Follows: 46 - Updated: 2/10 - Published: 6/28/2013 - 10th Doctor, Rose T., Sheldon C., Penny - Complete
The Sauron-Schicklgruber Paradox
by Missy the Least reviews
Sheldon has discovered that Leonard still has the One Ring and a wrestling match between the roommates ensues. In the struggle, Leonard is accidentally (or not) sent back to WWII Germany, where he is rescued by a certain group of Unsung Heroes completing a mission of their own. Can Col. Hogan and his gang save the Manhattan Project and send Leonard back? Also w/ LotR references.
Crossover - Hogan's Heroes & Big Bang Theory - Rated: T - English - Sci-Fi/Adventure - Chapters: 2 - Words: 1,621 - Reviews: 3 - Follows: 4 - Updated: 2/8 - Published: 2/3 - R. Hogan, Leonard H.
by TinyPrints reviews
The aftermath of the Arctic Expedition leaves Raj feeling guilty, even after all has been "forgiven". Seeking to improve his karma-and ease his mind-he invites a distressed friend to visit him. If she happens to be a genuine miracle worker, then that can only be a bonus. Funny and sweet, and maybe a little S&M (Not the traditional definition, of course. Can you imagine?)
Crossover - Big Bang Theory & Matilda - Rated: T - English - Humor/Friendship - Chapters: 3 - Words: 2,492 - Reviews: 4 - Favs: 3 - Follows: 7 - Updated: 2/6 - Published: 4/16/2013 - Sheldon C.
Hunters, Angels & Geniuses
by everythingwillbeperfect reviews
Dean, Sam & Cas at the Cheesecake Factory! Dean flirts, Penny smiles, Leonard drinks, Cas stares and Sheldon behaves like Sheldon. Or how Sheldon Cooper made a new friend. Just a one-shot which is hopefully funny. Due to the great response 2ND CHAPTER ADDED NOW. Please do R & R. Thanks :)
Crossover - Supernatural & Big Bang Theory - Rated: K+ - English - Humor/Friendship - Chapters: 2 - Words: 4,970 - Reviews: 19 - Favs: 43 - Follows: 13 - Updated: 2/4 - Published: 7/5/2013 - Dean W., Castiel, Sheldon C. - Complete
You're in My Spot
by Grac3 reviews
Drabble. Sherlock is in Sheldon's spot.
Crossover - Big Bang Theory & Sherlock - Rated: K - English - Humor - Chapters: 1 - Words: 320 - Reviews: 3 - Favs: 2 - Follows: 1 - Published: 2/4 - Leonard H., Sheldon C., Sherlock H., John W. - Complete
The Big Bang Friendship
by Rachelshamyfan reviews
What happens when Penny gets an audition for a show that has Joey Tribianni as lead actor, its a world where Leonard and Penny are not dating
Crossover - Friends & Big Bang Theory - Rated: K+ - English - Friendship/Romance - Chapters: 2 - Words: 2,301 - Reviews: 2 - Favs: 3 - Follows: 2 - Updated: 2/3 - Published: 2/2
That's my spot
Sheldon, by a terrible twist of events, is reaped into the second quarter quell. Will he be able to survive this blatant interruption to is routine lifestyle? Features all your favorite tributes as well as the BBT gang. No OC's, keeping it real over here. Please review and let me know if it's worth continuing! Rated T for violence and language.
Crossover - Big Bang Theory & Hunger Games - Rated: T - English - Humor/Adventure - Chapters: 1 - Words: 464 - Follows: 1 - Published: 1/27 - Finnick O.
by formerly webdoor reviews
Billy Craston gets a new job at Caltech. He meets four very smart, yet very nerdy guys. Starts in Season 6 then goes into season 7 of Big Bang Theory. There is a costume party. A prank is pulled on Sheldon after the party.
Crossover - Power Rangers & Big Bang Theory - Rated: T - English - Humor - Chapters: 16 - Words: 25,074 - Reviews: 39 - Favs: 9 - Follows: 11 - Updated: 1/14 - Published: 7/1/2013 - Billy C., Kat H., Leonard H., Sheldon C.
by SixShooterOutlaw reviews
When Discord overhears Rainbow Dash's wish for adventure, he gives her one she'll never forget!
Crossover - My Little Pony & Big Bang Theory - Rated: K - English - Humor/Adventure - Chapters: 7 - Words: 5,436 - Reviews: 1 - Favs: 2 - Follows: 3 - Published: 1/14 - Rainbow Dash, Sheldon C. - Complete
The Inadvertent Friendship Turnabout
by Computer Stalker reviews
When a very close friend of the esteemed yet eccentric Dr Cooper is murdered, he is arrested as the prime suspect due to his previous conflicts with the victim. Alienated by most of his former friends and colleagues, will he prevail and prove his innocence with the help of the one of the best defense attorneys in California?
Crossover - Phoenix Wright: Ace Attorney & Big Bang Theory - Rated: K+ - English - Drama/Crime - Chapters: 1 - Words: 840 - Reviews: 1 - Favs: 1 - Follows: 3 - Published: 1/4 - Phoenix W./Nick, Sheldon C.
What if Jack could find a way to bring Nathan back? How would he do it? Who would help? And how would he convince the person to help? Pay no attention to the genres... they're as close as I can get to correct. Rated T for stuff that happens in the show Eureka.
Crossover - Eureka & Big Bang Theory - Rated: T - English - Drama/Friendship - Chapters: 1 - Words: 2,389 - Favs: 1 - Published: 12/27/2013 - Jack C., Henry D., Sheldon C., Penny - Complete
House of Sheldon
by Tribute-Potterhead-0331 reviews
Sheldon and Leonard are going to England to speak at Anubis House. But, there, they get swept up in a Sibuna mystery. Sheldon tries to describe it scientifically, but Sibuna knows otherwise. Where will this go?
Crossover - Big Bang Theory & Het Huis Anubis/House of Anubis - Rated: T - English - Humor/Supernatural - Chapters: 14 - Words: 7,199 - Reviews: 30 - Favs: 7 - Follows: 3 - Updated: 12/26/2013 - Published: 5/12/2013 - Leonard H., Sheldon C., Nina M., Fabian R.
The Discord Disagreement
by kirbykid13 reviews
Leonard moves out and Sheldon gets a new roommate. It turns out his new roommate happens to be Discord. Meanwhile, Raj is having trouble yet again with his love life.
Crossover - My Little Pony & Big Bang Theory - Rated: K+ - English - Humor - Chapters: 6 - Words: 8,196 - Reviews: 3 - Favs: 8 - Follows: 7 - Updated: 12/23/2013 - Published: 11/7/2013 - Discord, Sheldon C.
TBPT2: Journey To The Center Of Aperture Science 243 | Page 1 2 3 4 .. Last Next »
by Joshweiser22 reviews
The sequel to my fanfiction "The Big Portal Theory"! What will happen to the Big Bang Theory crew when they see Chell's note? All that happens to Chell and more will finally be revealed!
Crossover - Big Bang Theory & Portal - Rated: K+ - English - Humor/Sci-Fi - Chapters: 6 - Words: 3,427 - Reviews: 3 - Favs: 6 - Follows: 6 - Updated: 12/22/2013 - Published: 9/24/2012