The TARDIS malfunctions and the Doctor and Donna Noble end up in New York in a parallel universe. Soon things go horribly wrong as a gargantuan creature attacks the city. Doctor Who/Cloverfield crossover.

COMPLETE. Firefly: :Harry Potter crossover Post Serenity. Two years have passed since the secret of the planet Miranda got broadcast across the whole 'verse in 2518. The crew of Serenity finally hires a new pilot, but he's a bit peculiar.

Sequel, Dr Who & the Ties that Bind. The TimeWar left him shattered & alone. Experiments left her shattered & open. They are Sanguine. The 6 souls destined form a web unbroken. Trap? Um.. Verity, 9, Simon, River, Riddick, Rose, Inara, Mal. X-over Riddick

Sequel, Dr Who & the Great Eclipse. The TimeWar left him shattered & alone. Experiments left her shattered & open. They are Sanguine. The 6 souls destined form a web unbroken. Trap? what Trap? Verity, 9, Simon, River, Riddick, Rose, plus. x-over Firefly

The TimeWar left him shattered & alone. Experiments left her shattered & open. The tools for revenge also form a web that cannot be broken. You're not scared of the dark are you? Pre Rose. 9th Dr, River and Simon Tam, The HunterGratzner. X-over, Firefly

It was about a month before the end of term when the little blue box appeared in the Gryffindor common room. Doctor Who/Harry Potter crossover.

All libraries are one. Which is how Harry Potter finds himself lost in the library aboard the TARDIS... Harry Potter/Doctor Who/Discworld crossover. Complete. One-shot.

UP FOR ADOPTION!On the morning of his 17th birthday, Harry Potter awakes to find a very mysterious letter and parcel among his belongings, what happens next could risk the fate of the world…This is my first attempt at a Doctor Who xover so please be kind

At a school in London called Deffry Vale, a man called the Doctor met a man called Harry Potter. Then Harry hitches a lift in a machine called the TARDIS, and who knows what'll happen? Harry Potter/Doctor Who Series Two Crossover. Work-In-Progress.

Harry Potter crossover. The TARDIS lands at Hogwarts, and the Doctor finds himself taking on the teaching post of defence against the dark arts... and an old friend who's not himself. AU OOTP.

HP/DW crossover. Follows storyline of "Love" and "Promises Kept." The Doctor and Rose take the position of DADA at Hogwarts during Harry Potter's fifth year. As the year progresses, they find themselves making new friends and new enemies. Read and review!

The TARDIS brings the Doctor to an individual with the potential to change the Earth. Crossover with Harry Potter. Rated T for mild language, and the mere existence of Captain Jack Harkness. Completed.

The Dursley's abandoned Harry after finding him on their doorstep because of a strange transformation he goes through. Crossover with Doctor Who challenge

AU. Harry Potter Doctor Who Crossover. Harry has never had a normal life and it’s about to get stranger. The Doctor and Rose come knocking and he finds himself with a whole new series of problems. How does the Doctor seem to know him? title may change

The Doctor decides to muck around with the time line, by giving the BoyWhoLived a family. A Doctor WhoHarry Potter crossover. Minor slash, TenJack if you squint. Implied Manipulative!Dumbledore, child abandonment, mentions of implied futurepast child abus

There are darker and stranger things than death in the universe. And one of them has decided to give Sirius Black a hand. Harry Potter Doctor Who crossover

During the battle in the graveyard in GOF, Harry is sent to meet a man named the Doctor who ends up changing things quite radically. HPDW xover. Story sadly suspended.

Harry Potter can never be simple. Harry Potter has a secret...in fact he has quite a few of them. What happens when a stranger in a blue box turns up during the welcoming feast in Harry's 7th year? and Harry knows him?...Doctor who xover SLASH JackxHarry

Sometimes it takes an interesting stranger to help Rose Tyler figure out just what she wants to do with her life. A post Doomsday tale and crossover with Harry Potter.

Xover, Doctor Who BG. Fed up, Harry attempts suicide, is rescued and shown a world more wonderful than he could ever imagine. Then he returns to face his former friends and so called destiny. NOT slash. Chapter 5 LLXHP in later chapters

HP Stargate XOver. Voldemort is defeated & Harry Potter no longer wants to be a tool for the Wizarding World, so he decides to find a place where he can belong. Complete.