The Mara has returned, infinitely more powerful than before, destroying whole civilizations in seconds. What does this have to do with a New York hockey player, his brilliant physicist friend who helped him pass high school and their circle of friends? (ALSO BABY DADDY CROSSOVER: Other characters Adam M, Danny W, Riley P, Ben W. Two-chapter story.)

When Leonard wakes up one morning to find the TARDIS behind the sofa, he knows that life as he knows it will never be the same. Sheldon can't contend with the fact that a television show is real, and that there is someone in the world smarter than him. Sparks will fly...

Sheldon Meets the Doctor. The Doctor and Clara finally get together with no real complications. Penny and Sheldon angst at each other. Fluffy stuff!

Rose and the Doctor are awoken to the sound of four repetitive knocks.

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)

Rose knew that this time traveling and jumping from place to place would get them in trouble one day, but meeting Dr. Sheldon Lee Cooper was the worst mistake yet.

In theory, everyone is useful ...

El Doctor conoce a Sheldon Cooper y no es agradable.

In a regular day at the Cheesecake Factory, Penny sees herself serving one of her favourite actress, Billie Piper. I've been having this idea for months, hope you enjoy! Oneshot (because I finally realized that I can only write those kind). Crossover. I think it's an AU…

Like my Immortal Beloved bits in my Buffyverse stories, these are fragments and short bits, some longer…Just to fiddle with ideas, possibly forming longer tales later

Penny is picked up by the TARDIS, and joins the Doctor on a mission to save an alien planet from destruction. Penny and Sheldon as the Doctor.

Ficlet. The Doctor meets Sheldon Cooper, and it's not pleasant.

the guys from big bang theory and how i met your mother get kidnapped by the daleks and only the doctor and maybe a bit of sheldon can help save the day

10/Rose. Big Bang Theory Crossover. Sheldon, Leonard, Howard and Raj are visiting London when suddenly they're caught up in the events of The Stolen Earth. FINISHED.

The guys are playing Halo when a mysterious blue box shows up in their living room. Can they figure out how to help the doctor? SUMMARY SUCKS BUT GOOD STORY1 PLEASE READ & REVIEW!

TBBT/Charmed/DW: Two demons want to kill Sheldon. "Why?" you ask. Sheldon isn't Sheldon. Sheldon has a fob watch. And to top it all off, he hasn't much memory of his life before. Oh look! A blue box! Yay! Watch for angels. Don't blink.

Penny doesn't believe in those science-fiction monsters...perhaps she should! After she walks into the gang watching The Impossible Astronaut, she experiences her own close encounter.

Written for ladyhouston and the Write For Relief meme. Prompt was: "Turns out Sheldon's a Time Lord. He takes Penny along as a companion."

"This is not one of those dreams. This is you and me stuck in space jail and at any moment a portion of the wall is going to open and an incarnation of the Doctor will come flying in and help us escape. No sex." Penny/Sheldon

"And his assistant, Doctor Sheldon Cooper". The Doctor introduces Donna to Leonard and Sheldon. Still WIP

What happens when Leonard meets the Doctor? COMPLETE

aka Brilliant Collision - A familiar blue box lands in Leonard and Sheldon's living room. Why is it there? Are the Doctor and Donna now trapped forever in the wrong universe? - Epilogue now up!