Big Bang Theory Crossovers
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One accident away by formerly webdoor reviews
Co written with mae-E. A meteorite lands outside of Pasadena California getting the attention of Cal Tech. The university assigns astrophysicist Dr. Rajesh 'Raj' Koothrappali with another astrophysicist Dr. William 'Billy' Cranston.
Crossover - Power Rangers & Big Bang Theory - Rated: T - English - Chapters: 4 - Words: 7,014 - Reviews: 8 - Follows: 2 - Updated: 4/22 - Published: 3/22 - Billy C., Rajesh K.
IT vs Big Bang by The Lurch
When Jen Barber opens a door in the office of the IT department in London which leads to the USA a battle of wits begin between two IT consultants and Two Physicists
Crossover - Big Bang Theory & IT Crowd - Rated: T - English - Humor/Adventure - Chapters: 2 - Words: 3,894 - Updated: 4/21 - Published: 4/20 - Leonard H., Sheldon C.
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: 3 - Words: 2,222 - Reviews: 7 - Favs: 4 - Follows: 11 - Updated: 4/11 - Published: 2/16 - Penny, Scott M., Allison A., Lydia M.
The End Is Never by Aussie Zoom
What will you do in the end will you hang or will you cut the rope
Crossover - Stargate: Atlantis & Big Bang Theory - Rated: T - English - Romance/Angst - Chapters: 1 - Words: 545 - Follows: 1 - Published: 4/9 - [Rodney M., Sheldon C.]
When Harry met Missy by MissBrittiny reviews
Harry moves to the United States to lecture at various magical and non-magical universities around the country. Finally, he settles down in Pasadena, CA after years of traveling. What happens when he becomes friends with the gang at 2311 N. Robles Ave, and later meets Sheldon's sister?
Crossover - Harry Potter & Big Bang Theory - Rated: T - English - Chapters: 10 - Words: 8,496 - Reviews: 64 - Favs: 209 - Follows: 302 - Updated: 4/9 - Published: 9/26/2013 - Harry P., Missy C.
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: 10 - Words: 16,289 - Reviews: 4 - Favs: 7 - Follows: 9 - Updated: 4/8 - Published: 12/23/2013 - Leonard H., Rajesh K., Black Widow/Natasha R., Hawkeye/Clint B.
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: 6 - Words: 18,914 - Reviews: 10 - Favs: 6 - Follows: 12 - Updated: 3/26 - Published: 3/1 - Leonard H., Sheldon C., Penny, Henry Mills
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 an 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: 5 - Words: 6,123 - Reviews: 12 - Favs: 2 - Follows: 7 - Updated: 3/22 - Published: 11/1/2013 - Leonard H., Sheldon C., Penny
(22)1b by Brobdingnagian Pseudonym reviews
After reichenbach, Sherlock moves in to 2311 N. los robles avenue under the alias Benedict Cumberbatch. Sheldon is threatened, Leonard is intrigued, Raj is enamored.
Crossover - Big Bang Theory & Sherlock - Rated: T - English - Humor - Chapters: 4 - Words: 5,355 - Reviews: 32 - Favs: 42 - Follows: 78 - Updated: 3/21 - Published: 7/18/2013 - Sheldon C., Sherlock H.
Brains Collide 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: 18 - Words: 29,495 - Reviews: 45 - Favs: 9 - Follows: 11 - Updated: 3/20 - Published: 7/1/2013 - [Jason L. S., Trini K.] [Leonard H., Sheldon C.] - Complete
100 Words, 100 Theories (Sheldon Won't Shut Up) by Manchester
The Pasadena guys land in Sunnydale sometime during the show's run, with their adventures set out in drabble form. Will our heroes survive life in this demon-haunted other California city?
Crossover - Buffy: The Vampire Slayer & Big Bang Theory - Rated: T - English - Humor - Chapters: 1 - Words: 934 - Favs: 3 - Published: 3/19 - Complete
The BronyCon Reevaluation by Supa Supa Bad Truly Mad Moves
Oneshot. The gang is all dressed up and ready to go to a major My Little Pony convention, but they're not at all prepared for the terrifying truth about why Sheldon doesn't want to go.
Crossover - My Little Pony & Big Bang Theory - Rated: K - English - Humor - Chapters: 1 - Words: 4,663 - Published: 3/17 - Complete
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: 4 - Words: 8,659 - Reviews: 3 - Favs: 1 - Follows: 8 - Updated: 3/16 - Published: 2/1 - Tim M., Delilah F., Alex J.
The Rising of the Nerds by agirlandherstories
Rose and the Doctor are awoken to the sound of four repetitive knocks.
Crossover - Doctor Who & Big Bang Theory - Rated: K+ - English - Chapters: 1 - Words: 259 - Favs: 1 - Published: 3/15 - 10th Doctor, Rose T., Sheldon C.
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: 2 - Words: 751 - Reviews: 2 - Updated: 3/15 - Published: 3/8 - Sheldon C., Rajesh K., Howard W.
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: 3 - Words: 4,782 - Reviews: 8 - Favs: 5 - Follows: 15 - Updated: 3/11 - Published: 3/2 - [Sheldon C., Amy Farrah Fowler] [Sherlock H., Molly Hooper]
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: 2 - Favs: 2 - Published: 3/7 - Freddie B., OC
The Fresh Theoretical Physicist of Bel-Air by UltimateBanchou
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: 7 - 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.]
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: 35 - 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.
Miracle 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: 22 - Favs: 48 - Follows: 14 - 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: 4 - Favs: 4 - Follows: 1 - Published: 2/4 - Leonard H., Sheldon C., Sherlock H., John W. - Complete
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