The Doctor, Rose and Captain Jack stop off in present-day Cardiff to recharge the TARDIS on the Rift they formerly encountered in 1869. Whilst there, they come upon a since-thought-long-dead enemy of theirs, who is hatching yet another plan to destroy Earth.
After narrowly escaping the gas mask monsters, The Doctor, Rose, and Captain Jack try to stop the mutated people from infecting other victims. But it soon becomes apparent that one of the group may indirectly responsible for the virus. The answer lies at the bomb site, but time is running out…
After chasing an unexplained capsule through time, the TARDIS lands in London, during an air raid. Rose investigates when a small child wearing a gasmask, standing on a rooftop, continuously calls out for his mummy. After floating above the city on a barrage balloon, Rose is swept off her feet by another time traveller – Captain Jack Harkness. Meanwhile, The Doctor follows a teenaged girl to a meeting of the homeless children of the Blitz. Here, the child in the gasmask is terrorising them with a parade of strange events, constantly asking for his mother.
Rose requests a trip back to the day her father, Pete Tyler, died. Reluctantly, the Doctor agrees, but he realises he has made a mistake, when Rose saves Pete from being run over by a car. This has now changed the timeline, and Reapers are transposing themselves all over the Universe. However, this time, the Doctor doesn’t have a plan…
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.
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…
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.
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.
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.”
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.