Rose Tyler meets a mysterious stranger called the Doctor, and realises Earth is in danger.
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The Doctor takes Rose on her first voyage through time, to the year five billion.
In Victorian Cardiff the dead are walking and creatures made of gas are on the loose.
Rose is taken home, but a spaceship crashes in the Thames and London is closed off.
Downing Street announces mankind's first Interplanetary War.
The Doctor and Rose discover the Time Lord's deadliest enemy beneath Utah.
The Doctor investigates a strange satellite, and Adam's skills as an assistant are tested.
Rose witnesses the day her father died, but interfering leads to terrible consequences.
Homeless children in wartime London are terrorised by an unearthly child.
The Child's plague is spreading throughout wartime London.
A plan to build a nuclear power station in Cardiff disguises an alien plot.
The Doctor, Rose and Captain Jack have to fight for their lives on board the Game Station.
Rose and the Doctor put their friendship to the test as Earth plunges into an epic war.