Classic British sci-fi adventure starring Tom Baker. The Doctor returns to Earth only to find Sontarans are experimenting on humans as part of a plot to take over the galaxy.

Classic British sci-fi adventure starring Tom Baker. The Doctor learns that the Sontarans are planning an invasion, and the only way to stop it is a duel with their leader.

Classic British sci-fi adventure starring Tom Baker. The Doctor and his companions are despatched by the Time Lords to the planet Skaro to prevent the creation of the nefarious Daleks.

Classic British sci-fi adventure starring Tom Baker. The Doctor and Harry are taken to a bunker where Davros is preparing to demonstrate the Daleks and Sarah is made a slave.

Classic British sci-fi adventure starring Tom Baker. The Doctor and Harry try to alert the authorities to Davros' plans while Sarah and Sevrin are forced to work on the Thals' rocket.

Classic British sci-fi adventure starring Tom Baker. The Doctor fails to prevent the Thals from destroying the Kaled city and must face an imminent attack from the Daleks.

Classic British sci-fi adventure starring Tom Baker. Davros learns full details of future Dalek victories from the Doctor, but opposition to Davros' plans is growing, leading to a rebellion.

Classic British sci-fi adventure starring Tom Baker. Gharman tries to sway the Kaleds to vote against the Dalek project, but Davros has a trick up his sleeve to ensure a Dalek victory.

Classic British sci-fi adventure starring Tom Baker. The Doctor and Sarah answer a distress call that leads them to Zeta Minor; the last planet of the known universe.

Classic British sci-fi adventure starring Tom Baker. The Doctor discovers that the planet Zeta Minor lies on the boundary between the universes of matter and anti-matter.