Sherlock and Mycroft might be unused to emotions and have very few weaknesses to be exploited. However, one weakness that terrifies both is their younger sister, who was born when Sherlock was seven. She has all of Mycroft's intelligence, and is as acrobatic as Sherlock. She was stolen, and trained to be an assassin. Her next hit is in 221B, and she doesn't know who her kill is.

A woman who doesn't believe in her own memories of two men who change her forever. One shot. I do not own Doctor Who or any characters related to the series.

Harry Potter disappeared when Lord Voldemort was vanquished, but what if even the Dark lord wasn't who everyone believed?

Sherlock and John were in Little Whinging on a case when they found a little boy. They decided to adopt them and call him their own. This is the story of him growing up. Fem Sherlock and twin William

Anna had left her adopted father's people over a decade ago to live a normal life in the small town of Aberporth. But when he appeared on in her flat one night, her world was thrown into chaos again. But in that chaos she finds an old, retired government official and his brother willing to help. (Mild JohnLock)

Two Time Lords are stranded on Earth, when they meet up with the Time Lord that 'Borrowed' their TARDIS.

When Sherlock was a young man, he had fallen in love. But when she went into a coma, he never forgot her.

Caterina Karpov was born at St. Bartholomew's Hospital in London, and her dad is some sort of detective. At least, that's what she was told by Irene Adler. Now that she's run away to London, the teen-aged genius must find her own way and learn of her past. It just won't be the past that she's expecting.

Agent 5693 is a woman known to the world of espionage as Des. She only takes orders from the secret head of MI 5, and has two younger siblings. She was trained her entire life to be a spy and assassin. But when a missile hits a building she was near in Kabul, she is rescued by an army surgeon and her legs saved. When she wants to locate him again, the head of MI 5 tries to stop her

John comes back to Sherlock's flat one day and finds a young woman there. As time passes, Moriarty decides to play a game with them and who knows how it will end?

What if the Marauders had four other friends in Hogwarts? Starts in their Fifth year.

At nineteen years old, Joanna Hailey Wilkes hates the cards she'd been dealt. Alone in the world, she works for a man she hates, trying to find his objective. What happens when she meets the man she's meant to find and he helps her find her father?

The paper looked ordinary, until you saw what was written on it. But when the Doctor picked it up, he didn't know what to think. A paper linked to a person behind a psychic barrier? He shrugged, and placed it in his pocket. It had only two lines on it when he first read it. A few hundred years later, he pulled it out and saw the words of the last line written.

Instead of Harry being a Potter, he is born to Lilly and Severus Snape, and he has a twin sister whom is the chosen one to defeat Lord Voldemort. After Lily and Severus are killed on All Hallows Eve, Harry and Titaina are sent to live with their Aunt Petunia and Uncle Vernon. However, that idea is soon squashed by Minerva. [Snape/Lily parents] Professor Potter, Professor Black

What if Harry Potter had a younger sister and she was raised by an alien and his three companions? This is the story of the other child who escaped the Dark Lord on that fateful Halloween night, Jessica Rose Potter. This is also the story of her first year at Hogwarts. - Doctor Who time is back about twenty years. PotterWhoLock

She was adopted by American muggles as a baby, and graduated from Hogwarts during his first ascension. He knew who she was and was determined to posess her as his own. When he returns after his rebirth, he takes her once more. But she will do everything in her power to stop him as she fights what Voldemort considers to be her destiny. Rated T for language.

The Doctor lands in 1934 London, and runs into an old friend. What will she say when she finds out who he really is?

The Doctor accidentally leaves behind his and River's daughter Elaine in 1996 London just as she began to regenerate. She hid herself like her father had done on many an occasion by turning herself into a human child. She was found and adopted by a kind man who raised her along with her honorary uncles. Sherlock time is back about ten years.

A woman comes to the scene of a crime, and Sally Donovan recognizes her.

Worst moment of my life was having to choose one of them. I had seen all of the possibilities and permutations, and chose my future. Why, why! The elders that saw all of the worlds and universes were cruel to make us see the worlds in their beauty and purity. Eight destinations. Eight possible futures, and I could only choose one. I wouldn't remember until it was too late. /On hold