Out in the Universe is a bright blue box, holder of a fantastical realm. Inhabiting this box is a mad man who calls himself the Doctor, his son, the Savior of the Wizarding World aka Harry Potter, an immortal man from the 51st century who affects a Captain in front of his name, Jack Harkness, and a pink and yellow once-human who is simply Rose Tyler. What was Dumbledore thinking?

Read about Harry Potter traveling to the Doctor Who universe and changing things as he joins the Doctor and the Master

Watch as Harry Potter travels to the Doctor Who universe and changes things as he joins the Doctor and the Master

All of Albus Dumbledore's plans and strategies for the prophecy, everything Lord Voldemort planned and plotted for the death of Harry Potter…all of them will be thrown out of the window. The Doctor, fresh from the Time War, has been on Earth, regenerated into a baby form, just wants to be left alone and recover his regenerating TARDIS, not fight another war.

A part-time companion to the Doctor falls through a rift in space/time, her scientific mind is challenged by the existence of magic and met with adventures completely different from what she has encountered before.

Ron, Hermione, Amy, and Rory were having a good time. Then Harry and Ginny showed up. Then Peeves, and weell... chaos ensued.

Harry stared at the Victorian clockwork man in confusion. This was not a Time Lord. This was not a TARDIS…Then why was he here? The Engineer was only summoned when a Time Lord or A TARDIS needed him to fix something. Harry/Doctor pairing, rating may change. You have been warned.

In third year, Harry Potter has a near fatal accident with a time turner while trying to save his godfather. Now Harry's not quite human and is beginning to have memories that aren't his own. The Doctor is now searching for the young Time Lord that he mentally sensed with a far-fetched hope that he is not alone. TimeLord!Harry

At a young age Harry met someone called the Doctor, he became his friend. Over the course of his school life the Doctor returned, in each of his incarnations. Leaving Hogwarts Harry continues to have adventures, visited upon by the Doctor's influences and further incarnations, friends, and enemies.

This story follows the relationship between two iconic characters, Harry Potter and the Doctor. At the start, they are at odds with each other, with Harry struggling to understand the Doctor's tendency to meddle in time and space. However, after several encounters, they form an unlikely bond after Harry comes to the Doctor's aid when he is trapped in a temporal loop.

The 13th Doctor has passed and now the Doctor's legacy will rest, at least in this reality. given the choice, the Doctor will now travel through the world of fiction saving them from dark evil

Hermione Granger loses everything in the final battle. When she tries to apparate to escape, an accident occurs, and she finds herself on the TARDIS with the Ninth Doctor. Can they both find happiness and love again with someone else who also knows what it is like to lose their whole world?

Un-deux-trois-quatre. Les tambours résonnent. Les tambours s'approchent. Un-deux-trois-quatre. La Guerre a soif du sang des Gallifréens. Un-deux-trois-quatre. Les derniers enfants du Temps souffriront dans une éternelle valse à quatre temps.

No TARDIS, no screwdriver, and no memory — on the plus side, an owl and a wand! May or may not be AU. "It's all in the mind, you know."

A long time ago, he used to be a Professor and the greatest wizard of his generation. A long time ago, he used to be a lot of things he isn't any more but most importantly, Human. Hell, he even used to have a proper gender. Now he was something else, the embodiment of pure evil...He used to have a true name too, not a designation. A long time ago he was Harry Potter.

Doctor Who/Next-gen AU: The 13th Doctor goes to Hogwarts to avoid telling Yaz how she feels when she meets Albus Potter who is in the same place as her. (Written for THC)

"Did I do it?" Donna asked, as The Doctor stared at her with disbelief written all over his face. "That's impossible!" The Doctor exclaimed. Or the one where Donna gives The Doctor a run for his money and Harry is given an opportunity to go anywhere in time and space.

What if the tale of Slytherin's monster lurking below the school was messing an important detail? What would have happened if more than one monster lurked below? Join Harry Potter, as he travels beneath the school to save Ginny Weasley. As the monsters close in, does anyone stand a chance of getting out alive? How this will turn out... No one knows.

'I'd like every of my characters to exist for real and I'd like to meet them, too'. Probably no one warned David Tennant not to make wishes if you're not prepared to see them come true. The Doctor has just lost his Companions to accept an absurd wish is just a way like another not to be alone, no matter if they are creatures with his same features. HUGE (fun) crossover!

When Jenny Smith moves across the road from the Dursley's, Harry get some form of a normal life with his best friend, who also happens to be the half alien daughter of The Doctor and River Song. But when they both start their fifth year in Hogwarts, Jenny has to deal with a DADA teacher after her head and her father's newly regenerated antics in his Eleventh incarnation...

Instead of befriending Ron on the Hogwarts Express, what if Harry befriended a pair of twins, Jodie and Matt Smith, and ended up having his adventures with them instead? Human!Doctors as a family. Fet. 9, 10, 11, 12 and 13 as well as four incarnations of The Master as well. Got the idea from a piece of fan art

Escaping from Dudley's bullying and her relative's cruelty, Harriett 'Harry' Potter is found by her parents' old friend, The Doctor, while in his 8th Incarnation before he has to leave her with Sarah Jane Smith while he fights in the Time War. When he returns in his next incarnation, he's more than ready to look after her and show her the universe while she's off school...

The Doctor comes to visit Hermione on Christmas not knowing that time has moved on while he was away.

*Story updated and reloaded.* This story is inspired by The Ballad of Snape (Hero of Hogwarts) by Vladimir Snape, which can be found on you Youtube. Watch it and tell me what you think. Involves the 11th Doctor. Can the Doctor prevent the Fate of Severus Snape and find him a good woman at the same time?

After a trip with Ace, the Seventh Doctor parks the Tardis briefly on the moon, wondering where to go next. Fate decided for him, and he receives a letter from Hogwarts, inviting him to be a student! The Doctor couldn't possibly refuse. How will the manipulative and cunning Seventh Doctor manage back in school? How will events change?