Big Bang Theory
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The Star Trek Original Series Uchronia
by Eliza Donelittle reviews
Leonard & the Big Bang Theory gang go to a fancy dress party and end up switching places with the crew of the Starship Enterprise (original series). They have to deal with the voyage of the Starship Enterprise while trying to figure out how to get home. Meanwhile Captain Kirk & crew have the same problem in The Big Bang Theory universe.
Crossover - StarTrek: The Original Series & Big Bang Theory - Rated: T - English - Humor/Sci-Fi - Chapters: 8 - Words: 15,707 - Reviews: 25 - Favs: 14 - Follows: 27 - Updated: 15h - Published: 10/20/2012 - J. Kirk, Spock, Leonard H., Sheldon C.
On a Vacation with her parents, Sarada Uchia walks into a stone circle and wakes up far from her home. Flung across time and Reality and taken in as an assistant to a recently single physicist. Sarada struggles with the life she knew and the one she now calls home. While the great heroes from before reunite to bring back their next generation. (Cossover with Outlander Elements)
Crossover - Naruto & Big Bang Theory - Rated: T - English - Adventure/Fantasy - Chapters: 2 - Words: 1,173 - Follows: 1 - Updated: 10/4 - Published: 9/20
Finding Their Feet
Kiko, Jewel and Sulley along with Honey are now young adults now but chaos and adventures happen living near the Big Bang Theory gang
Crossover - Big Bang Theory & Despicable Me - Rated: K+ - English - Humor/Friendship - Chapters: 4 - Words: 2,338 - Favs: 1 - Follows: 1 - Updated: 9/24 - Published: 2/19
The Apartment Below
by fandom.fantasy reviews
Sheldon and Leonard think everything is normal when all of a sudden, seven 18 year olds are moving into the apartment below. Little did they know who the seven were? After HoO Before Amy and Bernadette
Crossover - Percy Jackson and the Olympians & Big Bang Theory - Rated: K+ - English - Humor/Adventure - Chapters: 6 - Words: 3,600 - Reviews: 2 - Favs: 5 - Follows: 10 - Updated: 9/23 - Published: 7/27
A bloody nuisance
by Marjorie Nescio reviews
Doctor Sheldon Lee Cooper broke into Bill Compton's restricted database. Both men are brought before the Magister and Penny and her nerds show up at the scene. The Magister orders Bill to turn the fivesome. He is a cruel man indeed.
Crossover - Big Bang Theory & True Blood - Rated: T - English - Chapters: 6 - Words: 18,316 - Reviews: 20 - Favs: 4 - Follows: 9 - Updated: 9/19 - Published: 8/6/2014 - Sheldon C., Penny, Bill C.
Leonard and Tori
This is a remake of my Big Bang Theory/Victorious crossover.
Crossover - Big Bang Theory & Victorious - Rated: T - English - Friendship/Romance - Chapters: 12 - Words: 8,173 - Favs: 1 - Published: 9/10 - Leonard H., Tori V.
Possible Side Effect: A Broken Heart
A "Twilight Zone"-ish story in which Bernadette creates a pill that makes an old woman young again, making her a possible girlfriend for Raj. Raj and Margaret already have a lot in common: they love talking about comic books and "The Twilight Zone." They don't even notice the man who looks like Rod Serling.
Crossover - Twilight Zone & Big Bang Theory - Rated: K - English - Chapters: 1 - Words: 2,787 - Published: 9/7 - Complete
The Many Worlds Interpretation
by A.A. Pessimal reviews
The wizards of Unseen University created a pocket universe. They learnt how to interact with it and to visit one particular planet. Where there is the USA. California. Pasadena. Caltech. Where other academically and scientifically minded people - with personalities as quirky as those of UU's wizards - strive to solve the mystery of the Big Bang. And then they met.
Crossover - Discworld & Big Bang Theory - Rated: T - English - Humor/Sci-Fi - Chapters: 28 - Words: 165,310 - Reviews: 72 - Favs: 28 - Follows: 37 - Updated: 9/7 - Published: 11/1/2013 - Hex, Ponder Stibbons, Leonard H., Sheldon C.
The Gorn Hypothesis
by Borg 2 of 10 reviews
Sheldon gets an unexpected visit. Enjoy. Reviews are welcome.
Crossover - StarTrek: The Original Series & Big Bang Theory - Rated: K+ - English - Humor - Chapters: 1 - Words: 415 - Reviews: 1 - Published: 9/5 - J. Kirk, Spock, Leonard H., Sheldon C.
The Young Guns Approximation
When a new intern begins work with Sheldon, Leonard and the guys make it a point to introduce themselves. What they find is young Alan Powers, a Sheldon mini-me who makes all of their work look inferior. The guys have no choice but to try to get the boy away from Sheldon so that things can get back to normal. Will they be successful? One-shot.
Crossover - Arthur & Big Bang Theory - Rated: K+ - English - Drama/Humor - Chapters: 1 - Words: 1,341 - Published: 9/2 - Brain P., Leonard H., Sheldon C., Howard W. - Complete
It all started with a titan
by tsubasaiscool reviews
Sheldon invents a time machine and they travel 200 years into the future and they find themselves in the world of attack on titan.
Crossover - Big Bang Theory & Attack on Titan/進撃の巨人 - Rated: T - English - Adventure - Chapters: 1 - Words: 136 - Reviews: 2 - Favs: 1 - Follows: 3 - Published: 8/23
Parseltongue in Pasadena
by nerdgirlsofwitchwood reviews
A surprise trip to the States ends in adventure and confusion when Harry and Draco bump into their favourite ship... Drarry and Shamy crossover
Crossover - Harry Potter & Big Bang Theory - Rated: T - English - Humor/Adventure - Chapters: 2 - Words: 1,793 - Reviews: 5 - Favs: 4 - Follows: 3 - Updated: 8/19 - Published: 3/8
Nicktoons Unite Dimensional Destortion
by crossoverking18 reviews
Darkness is taking over the multiverse and it is up to the nicktoons to find new allies and put an end to the evil plans of the god of darkness, Surge.
Crossover - Sonic the Hedgehog & Big Bang Theory - Rated: K+ - English - Humor/Adventure - Chapters: 16 - Words: 59,428 - Reviews: 36 - Favs: 1 - Follows: 1 - Updated: 8/15 - Published: 10/1/2014 - Sonic, Tails, Sheldon C.
The characters of TBBT, Sherlock BBC, Community, Psych and Warehouse 13 find themselves on a spaceship, billion light-years from earth. How will they manage this situation? This is the story of the adventures and fun they shared.
Crossover - Big Bang Theory & Sherlock - Rated: T - English - Humor/Drama - Chapters: 3 - Words: 4,696 - Updated: 8/3 - Published: 8/2 - [Sheldon C., Amy Farrah Fowler] [Sherlock H., OC]
Penny in Peril
by Cosmic Daeva reviews
Not a one shot anymore. Billie's new life takes a crazy turn when the Charmed One's show up. In other words. Whatever the hell I'm doing with my life.
Crossover - Charmed & Big Bang Theory - Rated: K+ - English - Friendship/Hurt/Comfort - Chapters: 6 - Words: 3,155 - Reviews: 8 - Favs: 4 - Follows: 8 - Updated: 8/1 - Published: 2/15 - Piper H., Phoebe H., Paige M., Penny - Complete
The Warehouse Circumvention
by Daedaleopsis reviews
A mysterious artifact shows up at a critical juncture in Sheldon's life. Can Myka, Pete and Claudia save the day?
Crossover - Big Bang Theory & Warehouse 13 - Rated: T - English - Supernatural/Drama - Chapters: 5 - Words: 13,211 - Reviews: 6 - Favs: 5 - Follows: 5 - Updated: 7/29 - Published: 7/9 - Complete
Pokébang: The Last Goodbye
by MCEProd22 reviews
In the final chapter of the Pokébang Trilogy. As C. Roger Harrison Shatters Pasadena, the nerds and the Trainers reunite for one final incursion. While on the other side of a portal now tearing a world apart everyone Ash Ketchum knows and met comes together for a war which will decide the fate of all. Who will win lose and survive. "Will you follow me, One Last Time."
Crossover - Pokémon & Big Bang Theory - Rated: T - English - Sci-Fi - Chapters: 4 - Words: 3,870 - Reviews: 1 - Favs: 1 - Follows: 1 - Updated: 7/27 - Published: 2/8 - Ash K./Satoshi, Iris, Sheldon C., Amy Farrah Fowler
How the Big Bang Theory Met Penny Mosby
by TheRealQuestion reviews
Penny has never told any of the gang what her last name is, and she's not about to. But what if her last name was Mosby, and her father was Ted Mosby? AU from the start. Includes Penny backstory and has a different timeline than what is originally presented in both shows. I disregard the finale of HIMYM, but Tracy is dead, though Barney and Robin are together.
Crossover - How I Met Your Mother & Big Bang Theory - Rated: T - English - Humor/Romance - Chapters: 3 - Words: 3,172 - Reviews: 1 - Favs: 1 - Follows: 1 - Updated: 7/27 - Published: 7/25 - Barney S., Marvin E. JR., Leonard H., Penny
Fig Newtons Are Named After What?
"I told Horace that they were named after Issac Newton but he said I was dumb and that they weren't!" It was going to be a long day for Halt. Just some insanity my friend, With-the-Wolves, and I came up with after a late night Big Bang Theory watching. Rated K because of the very last word in the actual story that some people would consider bad. Might add chapters.
Crossover - Big Bang Theory & Ranger's Apprentice - Rated: K+ - English - Humor/Parody - Chapters: 1 - Words: 660 - Published: 7/26
Making Friends With Boov
Oh makes friends with Sheldon and discover they have things in common leading to fun and adventures
Crossover - Big Bang Theory & Home - Rated: K+ - English - Humor/Friendship - Chapters: 7 - Words: 3,376 - Favs: 1 - Follows: 1 - Updated: 7/20 - Published: 4/22 - Sheldon C., Oh
The Witch-Bang Theory
by JBean210 reviews
Penny meets her grandfather Maurice and learns she's a witch. How will she handle her new-found abilities and relatives? How can Leonard help her cope with them? And what will this mean for the future of their engagement and their relationship? A Big Bang Theory / Bewitched (Classic TV series) crossover.
Crossover - Big Bang Theory & Bewitched - Rated: T - English - Humor - Chapters: 15 - Words: 124,921 - Reviews: 93 - Favs: 31 - Follows: 38 - Updated: 6/26 - Published: 10/3/2014 - Leonard H., Sheldon C., Penny - Complete
A Johnlock Fanfiction
by MrsFreeman123 reviews
John and Sherlock arrive in Pasadina, America. What happens when Sherlock Holmes and Sheldon Cooper meet for the first time? Read on to find out!
Crossover - Big Bang Theory & Sherlock - Rated: K - English - Crime/Romance - Chapters: 1 - Words: 2,827 - Reviews: 1 - Favs: 2 - Follows: 1 - Published: 6/9
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: 14 - Words: 25,033 - Reviews: 27 - Favs: 5 - Follows: 10 - Updated: 6/8 - Published: 3/22/2014 - Billy C., Rajesh K.
Kaiba's Big Bang Theory
by Animecomicgeek94 reviews
A hybrid of episodes of The Big Bang Theory with Yugioh characters.
Crossover - Yu-Gi-Oh & Big Bang Theory - Rated: K+ - English - Humor/Romance - Chapters: 1 - Words: 415 - Reviews: 1 - Favs: 2 - Published: 6/7
A Boov Of His Own 308 | Page 1 2 3 4 11 .. Last Next »
When Oh and Sheldon find a female Boov youngster, Sheldon plays Dad to her but things get good
Crossover - Big Bang Theory & Home - Rated: K+ - English - Humor/Family - Chapters: 3 - Words: 1,535 - Updated: 5/9 - Published: 5/5 - Sheldon C., Oh