Classic British sci-fi adventure starring Peter Davison. Desperately trying to save the Doctor from the Tractators' trap, Tegan soon finds herself in big trouble as well.

Classic British sci-fi adventure starring Peter Davison. The doctor finally finds the TARDIS in the tunnels beneath the planet's surface. But will he be able to get it to work again? Part 4/4.

Classic British sci-fi adventure starring Peter Davison. Strange alien canisters appear in London's docklands. Meanwhile, a prison space station holding Davros is attacked. Part 1/4.

Classic British sci-fi adventure starring Peter Davison. Strange alien canisters appear in London's docklands. Meanwhile, a prison space station holding Davros is attacked. Part 2/4.

Classic British sci-fi adventure starring Peter Davison. While the survivors of the prison attack fight the invaders, Dalek agents on Earth try to preserve the time corridor. Part 3/4.

Classic British sci-fi adventure starring Peter Davison. While the survivors of the prison attack fight the invaders, Dalek agents on Earth try to preserve the time corridor. Part 4/4.

Classic British sci-fi adventure starring Peter Davison. The Doctor and Peri get involved in the drug trade on a far flung planet after they are targeted for execution.

Classic British sci-fi adventure starring Peter Davison. A new acquaintance takes a shine to Peri and both the Doctor and his companion discover they have contracted a deadly disease.

Classic British sci-fi adventure starring Peter Davison. After narrowly escaping a vicious magma creature the Doctor is taken prisoner by gun runners.

Classic British sci-fi adventure starring Peter Davison. The Doctor faces the seemingly impossible task of a finding the antidote to Spectrox poisoning and saving his companion, Peri.