Big Bang Theory Crossovers
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The One AM Complication by Fophelia1331
First, Sheldon shows up at our apartment, very drunk. And now no one wants to come to take him off our hands. We have no clue what to even do with him at this point. Alphys is hiding while Frisk and Undyne get quite upset. Please send help! (Takes place during The Hot Troll Deviation (4-4))
Crossover - Big Bang Theory & Undertale - Rated: T - English - Humor - Chapters: 1 - Words: 1,785 - Favs: 1 - Published: 2/6/2021 - Sheldon C., Frisk, Sans, Undyne
The Big Bang Theory: from Ordinary to Extraordinary by Cecelia021
In this AU crossover story: Cecelia has graduated from U.A. High and came to California for a seasonal course in the Fall and possible Winter. This is when she meets Leonard and his friends. With her identity as a Pro Hero, what would happen if her secret comes out? How would Leonard react? And what would happen if Katsuki Bakugou would show up? Let's dive in to find out!
Crossover - Big Bang Theory & My Hero Academia/僕のヒーローアカデミア - Rated: M - English - Romance - Chapters: 9 - Words: 17,774 - Favs: 2 - Follows: 1 - Updated: 12/13/2020 - Published: 12/4/2020 - Complete
The Affection Deviation by starrnobella reviews
After Sheldon helped Luna with the spider in her apartment, she started hanging out with him and his friends even more. Penny alludes that there could be more to Sheldon and Luna's friendship than meets the eye.
Crossover - Harry Potter & Big Bang Theory - Rated: K+ - English - Romance/Friendship - Chapters: 1 - Words: 697 - Reviews: 2 - Favs: 22 - Follows: 16 - Published: 12/9/2020 - Luna L., Sheldon C., Penny - Complete
A Helping Hand by starrnobella reviews
Upon the discovery of a spider taking up residence in her kitchen, Luna stumbled into her unusual neighbor.
Crossover - Harry Potter & Big Bang Theory - Rated: K+ - English - Humor - Chapters: 1 - Words: 1,259 - Reviews: 2 - Favs: 25 - Follows: 13 - Published: 12/8/2020 - Luna L., Sheldon C. - Complete
Not Everybody Celebrates Halloween by Know It All Hermione reviews
On Halloween Stuart Bloom receives a late invitation to go to a friend's Halloween party and he mentions it to his boyfriend Harry at breakfast , not knowing that Harry doesn't really like Halloween.
Crossover - Harry Potter & Big Bang Theory - Rated: K+ - English - Romance/Hurt/Comfort - Chapters: 1 - Words: 1,303 - Reviews: 1 - Favs: 38 - Follows: 23 - Published: 12/7/2020 - [Harry P., Stuart] - Complete
They Met in a Comic Book Shop by Know It All Hermione reviews
While working at his comic book shop Stuart Bloom gets a customer who develops an romantic interest in him. Weeks after and after more visits to the shop the customer asks Stuart out on a date and Stuart accepts.
Crossover - Harry Potter & Big Bang Theory - Rated: T - English - Romance - Chapters: 1 - Words: 2,676 - Reviews: 2 - Favs: 40 - Follows: 20 - Published: 12/7/2020 - [Harry P., Stuart] - Complete
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: 3 - Words: 6,760 - Reviews: 49 - Favs: 128 - Follows: 54 - Updated: 11/27/2020 - Published: 7/5/2013 - Dean W., Castiel, Sheldon C. - Complete
The Hot Guy Conundrum by MissYingYangKay reviews
"Oou, hot guy coming in…" Bernie whispered as she walked past the bar with an impish little grin, not even stopping before she was back making rounds to clean around. The guy Penny then saw was indeed hot.
Crossover - Big Bang Theory & Hetalia - Axis Powers - Rated: K+ - English - Humor - Chapters: 1 - Words: 4,413 - Reviews: 4 - Favs: 35 - Follows: 19 - Published: 11/8/2020 - Leonard H., Sheldon C., Penny, America - Complete
The Golden Girl Theory by fancy71992
Five one-shots that show how Sophia and Dorothy would have reacted to the events that took place in, "A Blue Paisley Mini Dress and Colorful Daisies," "A Fake Divorce and A Tub With Jets," "A Reconciliation and A Blue Diamond," "Strawberry Blonde Hair and Blue Lace," and "Forgiveness, Acceptance, and Love."
Crossover - Golden Girls & Big Bang Theory - Rated: T - English - Drama/Humor - Chapters: 5 - Words: 17,182 - Favs: 3 - Follows: 3 - Published: 10/14/2020 - Dorothy Z., Sophia P., Mrs. Hofstadter - Complete
A Sociopath and A Couple of Golden Girls by fancy71992 reviews
This is a bit of a mash-up of my "Andrew" stories. Anything he did to Beverly in the other stories, he does to her in this one. The difference is Beverly has her mother and sister to help her get through this.
Crossover - Golden Girls & Big Bang Theory - Rated: T - English - Drama/Family - Chapters: 5 - Words: 6,568 - Reviews: 4 - Published: 10/13/2020 - Dorothy Z., Sophia P., Mrs. Hofstadter - Complete
Stuffed Shells and a Misdiagnosis by fancy71992 reviews
This has some elements from my other TBBT stories. This time Sophia is Beverly's mother and they are trying to mend their relationship.
Crossover - Golden Girls & Big Bang Theory - Rated: T - English - Humor/Drama - Chapters: 6 - Words: 8,200 - Reviews: 6 - Favs: 1 - Follows: 1 - Updated: 10/11/2020 - Published: 10/10/2020 - Dorothy Z., Sophia P., Mrs. Hofstadter - Complete
Cats, Telephone Wires, and One Too Many Strikes by Fophelia1331 reviews
Amy's broken up with Sheldon, and we have to deal with the fallout of that. Undyne realizes that he keeps track of things too well, while Frisk never thought she'd be this upset with someone. Everyone's just praying Sheldon's mom gets here soon enough. If we don't make it, tell the story for us.
Crossover - Big Bang Theory & Undertale - Rated: T - English - Humor/Drama - Chapters: 1 - Words: 2,582 - Reviews: 1 - Favs: 1 - Published: 10/7/2020 - Leonard H., Sheldon C., Frisk, Undyne - Complete
The Radio Demonization by Dinopony2580 reviews
One day, Leonard and Sheldon get an unexpected visit from a tall, slender man in a red suit. He is unlike anything they've ever seen, not to mention he acts weirdly. However, he needs a place to stay, and they accept him as a temporary roommate. They will soon find out they just invited the most terrifying demon in all of Hell to stay with them and soon, hilarity ensues.
Crossover - Big Bang Theory & Hazbin Hotel - Rated: T - English - Humor/Supernatural - Chapters: 3 - Words: 5,249 - Reviews: 2 - Favs: 13 - Follows: 8 - Published: 9/22/2020 - Leonard H., Sheldon C., Alastor - Complete
The Big Bong Theory by Jaime Hudson
Sheldon and Leonard 'slide' and see their alternate dads - and another Carl Sagan!
Crossover - Sliders & Big Bang Theory - Rated: T - English - Humor - Chapters: 1 - Words: 208 - Published: 7/10/2020 - Complete
BÅNG by 22keyPHOENIX
In a universe where the Stargate program exists hidden in the shadows, Howard Wolowotz awakens from a nightmare where an alternate reality version of him died to protect his friends. Latent Ancient genes activated Howards inteligence grows by leaps and bounds. Using the chance to finally one-up Sheldon, Howard unintentionally gets the whole crew involved in national secrets.
Crossover - Stargate & Big Bang Theory - Rated: T - English - Adventure/Sci-Fi - Chapters: 3 - Words: 5,751 - Favs: 1 - Follows: 2 - Updated: 6/29/2020 - Published: 6/23/2020
The magic and science by Reflective glass reviews
This is the story of the time when Harry potter and the big bang theory' s gang meet unexpectedly. Will science and magic go along or will their geeky sides take over? It all start in 1988...with a time turner
Crossover - Harry Potter & Big Bang Theory - Rated: T - English - Humor/Fantasy - Chapters: 8 - Words: 9,998 - Reviews: 4 - Favs: 18 - Follows: 25 - Updated: 5/3/2020 - Published: 6/27/2019
BigBangTale by boopnoodle420 reviews
When the monsters finally escape from the Underground, some can't afford to rent or buy their own homes. So King Fluffybuns has asked some humans to open their homes to the monsters until they can get back on their feet. Sans and Papyrus are invited into the apartment of a broke blonde, who is toeing the line of alcoholism. Fun!
Crossover - Big Bang Theory & Undertale - Rated: T - English - Humor/Friendship - Chapters: 4 - Words: 2,127 - Reviews: 3 - Favs: 2 - Follows: 4 - Updated: 1/20/2020 - Published: 1/16/2020
The One With The Famous Physicist by Anthony Bruce Williams reviews
Sheldon Cooper and Chandler Bing's paths cross in Chicago.
Crossover - Friends & Big Bang Theory - Rated: T - English - Family - Chapters: 1 - Words: 1,367 - Reviews: 8 - Favs: 11 - Follows: 8 - Published: 12/21/2019
Harry Potter and The Big Bang Connection by AnnaleaseTurner reviews
Something is stranger than usual with Sheldon, what could this be? Find out the connection with Harry Potter as you read.
Crossover - Harry Potter & Big Bang Theory - Rated: T - English - Chapters: 1 - Words: 474 - Reviews: 5 - Favs: 24 - Follows: 40 - Published: 11/8/2019
Your Presence Honours Us by sjmax reviews
Before Amy. Before Santana. An unlikely friendship is about to develop. Will it turn to romance?
Crossover - Big Bang Theory & Glee - Rated: K - English - Humor/Romance - Chapters: 1 - Words: 943 - Reviews: 2 - Favs: 4 - Follows: 3 - Published: 11/3/2019 - Sheldon C., Penny, Brittany P.
The Graphic Disagreement by Fophelia1331 reviews
When Frisk, Sans, Leonard, and Penny walk in on Undyne, Alphys, Howard, and Sheldon arguing over comics and manga, well things get weird, that's true.
Crossover - Big Bang Theory & Undertale - Rated: T - English - Humor - Chapters: 1 - Words: 341 - Reviews: 4 - Favs: 3 - Follows: 1 - Published: 9/13/2019 - Sheldon C., Howard W., Undyne, Alphys - Complete
The Gull Cottage Hypothesis by Juleeroze reviews
Carolyn Muir and Daniel Gregg have passed on but still remain interested in the happenings of mortals. Their children are not only grown, but middle aged and although they own Gull Cottage jointly, Candy and Jonathan rent it out in the summer. What happens when Sheldon Cooper and Amy Farrah Fowler rent it for the summer after winning the Nobel Prize in Physics? A lot!
Crossover - Ghost and Mrs. Muir & Big Bang Theory - Rated: K - English - Humor/Romance - Chapters: 9 - Words: 21,457 - Reviews: 1 - Favs: 1 - Published: 7/26/2019
Back in Time by Sbi
It's a mix between two of my favorite Shows. Sience meets Magic. I changed the names of the Halliwell childern and their last Name is different.
Crossover - Charmed & Big Bang Theory - Rated: T - English - Chapters: 9 - Words: 19,896 - Favs: 1 - Follows: 1 - Updated: 6/11/2019 - Published: 11/27/2018 - Chris H., Sheldon C., Amy Farrah Fowler - Complete
The Timbre Reconfiguration by Smeg699 reviews
Instead of traveling to Barden for her college education, Beca instead gets four years in LA to make her dreams happen. How will our little DJ fare with a pair of hot blonds and five crazy scientists?
Crossover - Big Bang Theory & Pitch Perfect - Rated: K+ - English - Humor - Chapters: 7 - Words: 53,542 - Reviews: 26 - Favs: 54 - Follows: 91 - Updated: 5/16/2019 - Published: 5/27/2014 - Penny, Aubrey P., Beca M., Chloe B.
Theory of The Big Bang by ArtAddictedArchitect reviews
A Bisexual, PartiallyAscended! Self Insert Howard Wolowitz crossover with Stargate. What do you do when you're a SI! trapped in a crossover universe? Goa'uld, Shadowy government organizations, the Lucian Alliance out to destroy the Earth with Howard and the gang trapped on the starship Destiny. The Destiny Of All Things is hidden in the Cosmic Microwave background.
Crossover - Big Bang Theory & Stargate: Universe - Rated: M - English - Adventure/Sci-Fi - Chapters: 18 - Words: 39,583 - Reviews: 140 - Favs: 166 - Follows: 192 - Updated: 5/2/2019 - Published: 3/7/2019 - [Howard W., Leslie W., Amy Farrah Fowler, Rajesh K.]
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