Classic British sci-fi adventure starring Peter Davison. The Doctor and his cohorts journey to the jungle world of Deva Loka, which is being surveyed for possible Earth colonisation.

Classic British sci-fi adventure starring Jon Pertwee. Just when the Doctor thinks he's escaped the spiders, he encounters the Great One, while Sarah makes a deal with the Queen Spider.

Classic British sci-fi adventure starring Jon Pertwee. The Doctor is convinced to face his fear and return the crystal to the Great One - but first he must evade Barnes and his men.

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 takes Harry on a trip aboard the TARDIS and their journey lands them on a potentially deadly space station in the far future.

Classic British sci-fi adventure starring Tom Baker. The Doctor revives the Ark's medic to help Sarah, but when the station commander is also revived he is suspicious of the group.

Classic British sci-fi adventure starring Tom Baker. The Doctor pleads with Vira not to revive the rest of her people for their own safety after Noah is infected by the Wirm.

Classic British sci-fi adventure starring Tom Baker. The Doctor tries to protect those still in cryogenic suspension from the Wirm, who are targetting Earth as their new breeding ground.

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.