Classic British sci-fi adventure starring Tom Baker. Preparing to repair the TARDIS, the Doctor travels to Earth to get the measurements of a police box. His presence is soon noted.

Classic British sci-fi adventure starring Jon Pertwee. The Doctor escapes the confines of the castle and must convince Sir Edward to trust him before Irongron launches an attack.

Classic British sci-fi adventure starring Jon Pertwee. The Doctor attempts to return the scientists to their own time, while Linx tries to use his spaceship - with destructive results.

Classic British sci-fi adventure starring Jon Pertwee. The TARDIS is diverted to the barren planet Exxilon where the Doctor discovers the Daleks are searching for a cure to a space plague.

Classic British sci-fi adventure starring Jon Pertwee. The Doctor forms an unlikely alliance with the Daleks to mine the parrinium only to come under attack from the Exxilons.

Classic British sci-fi adventure starring Jon Pertwee. The Doctor and Sarah meet with Bellal, who helps them evade the Daleks and explains the origin of the city.

Classic British sci-fi adventure starring Jon Pertwee. The Doctor and Bellal penetrate the city's defences while Sarah and Jill try to stop the Daleks from escaping with the parrinium.

Classic British sci-fi adventure starring Jon Pertwee. While the Doctor investigates ESP, Sarah is invited to investigate some strange goings on at a meditation centre.

Classic British sci-fi adventure starring Jon Pertwee. Lupton forms an alliance with the spider to steal the Doctor's blue crystal, while Sarah and Mike try to show people the truth.

Classic British sci-fi adventure starring Jon Pertwee. Sarah and the Doctor try to retrieve the crystal from the meditation centre while Lupton prepares to return it to Metebelis Three.

Classic British sci-fi adventure starring Jon Pertwee. Sarah is captured by the spiders, while the Doctor tries to rally Arak and the others into striking back against the creatures.