4/13 Martha Jones summons the Doctor back to modern-day Earth, but an old enemy lies in wait.
3/13 On her first alien world, Donna finds the human race has developed dark secrets...
2/13 It's Volcano Day in Pompeii... Can Donna dare the Doctor to change history?
1/13 Donna and the Doctor reunite and must save the lives of millions.
7/7 The Thals and the TARDIS crew attack the Daleks from all sides, but the Daleks fight back.
6/7 The Doctor and Susan are once again taken prisoner by the Daleks...
5/7 Ian and Barbara join a Thal force that will penetrate the Dalek city from the rear...
4/7 Pretending to be a Dalek, Ian finds that that he is trapped inside the casing.
3/7 Fearful of a Thal attack, the Daleks force Susan to invite the Thals to the city.
2/7 Looking for Barbara, the travellers realise they have been exposed to radiation poisoning.
1/7 The travellers venture explore a new world. Everything seems to be dead, but is it really?
When disaster hits the Titanic, the Doctor uncovers a threat to the whole human race.
The Doctor finds himself with a new companion, and they uncover an ancient alien plan.
The newly-regenerated Time Lord is out of action, but the Sycorax are coming...