London, the near future. The Doctor and Sarah return to a deserted city under martial law. What mysterious force has emptied central London?
London, the near future. The Doctor and Sarah have returned to a London evacuated by the appearance of dinosaurs. Can the Doctor work out where they are coming from?
The Doctor tries to determine who is bringing dinosaurs into modern London. But forces within UNIT itself are working against him.
The Doctor continues to search for the source of the dinosaurs. But Sarah can't help him; she's imprisoned on a distant spaceship…
The Doctor is on the run, accused of bringing the dinosaur invasion. And Sarah discovers the awful truth behind the colony ship.
Grover launches the final phase of his plan to create a new world. But both Sarah and the Doctor are on the run…
The barren planet Exxilon, some time in the future. The TARDIS is forced down by a total power failure and the Doctor and Sarah meet a stranded Earth crew who came here to mine for priceless medical supplies. But what is causing the power failures?
The Doctor and Sarah are trapped on Exxilon with a group of humans and Daleks. But something even more dangerous may be waiting, deep in the rocksâ€¦
On Exxilon, the Daleks are mining an ore vital the survival of the Galaxy. But an advanced city nearby will keep anyone from leaving with the precious parriniumâ€¦
The Doctor and Bellal work their way into the Exxilon city, with the Daleks in pursuit. Can they get away with the cure for the deadly disease ravaging the Galaxy?