This is the first series to feature David Tennant as the tenth Doctor. He continues to travel with his companion Rose Tyler (Billie Piper), with whom he has grown increasingly attached. They also briefly travel with Rose's boyfriend Mickey Smith (Noel Clarke), and Camille Coduri reprises her role as Rose's mother Jackie. The series is connected by a loose story arc consisting of the recurring word "Torchwood". This is also the first series to be preceded by a Christmas special, which was commissioned to see how well the show could do at Christmas. The success of "The Christmas Invasion" led to the Christmas special becoming an annual tradition.
In the year five billion and twenty-three, after the destruction of the Earth, the Doctor takes Rose to the New Earth. There, in a hospital facility, the feline Sisters of Plenitude can mysteriously cure any diseases, but, in the basement, an old enemy of the Doctor is out for revenge.
Landing in 1879, Scotland, the Tenth Doctor and Rose meet Queen Victoria, travelling with her to spend the night at the Torchwood Estate. However, a group of warrior monks have sinister plans for the monarch, and the full moon is about to summon a creature out of legend.
There are strange goings-on at a comprehensive school - UFOs, over-intelligent children, and odd-tasting school dinners. This attracts the attention of the Tenth Doctor, Rose and Mickey Smith, as well as a couple of old friends…
On a seemingly abandoned spaceship in the 51st century, the Tenth Doctor, Rose and Mickey find time windows leading to 18th century France and a group of clockwork androids using them to stalk a young woman throughout her life.
After the TARDIS makes a crash landing on the Earth of another universe, Rose discovers her father is alive and rich, Mickey encounters his alternative self, and the Tenth Doctor learns one of his oldest and deadliest foes is about to be reborn.
The plans of John Lumic to convert the world into Cybermen are now in full force. The Tenth Doctor, Rose, Mickey and the Preachers must find a way to stop him from enforcing his "ultimate upgrade."
In 1953 London, the police are abducting people from their homes. The people of Britain gather around their new-fangled "tele-vision" sets to celebrate the new Queen's coronation - but something strange is affecting the signal.
Rose finds herself further away from home than ever before, on a desolate world in the orbit of a Black Hole. Trapped with an Earth expedition and the mysterious Ood, the time-travellers face an even greater danger as something ancient beneath the planet's surface begins to awake.
The TARDIS lands in a base on a planet orbiting a black hole, an impossible situation that stumps even the Tenth Doctor. The base crew are drilling to the centre of the world, to claim the power that keeps it in orbit for themselves. However, an ancient evil is down there too, and he is awake…
An ordinary man named Elton Pope becomes obsessed with the Tenth Doctor, Rose and their strange blue box, joining a group of like-minded people in hopes of finding him. But when the mysterious Victor Kennedy joins the group, the fun soon stops and Elton discovers a darker side to his hobby.
When the TARDIS lands in 2012, the Tenth Doctor plans to show Rose the London Olympics. However, ordinary children are vanishing into thin air, a mother living in a seemingly normal British household is trying to hide her daughter's unnatural powers from the world, and a demonic presence lurks in an upstairs cupboard.
Ghostly beings have been regularly appearing across the world and people, believing them to be their dead loved ones, are welcoming their visits with open arms. When the TARDIS arrives at the Torchwood Institute, the Tenth Doctor and Rose are taken prisoner. They are drawn into the investigation of a mysterious sphere kept in Torchwood Tower, and monstrous foes return as two universes collide.
Humanity is caught in the crossfire as the Cybermen and the Daleks wage war against each other. When the mysterious Genesis Ark opens, the Tenth Doctor is faced with an impossible decision: saving the world could mean losing Rose Tyler forever…