The TARDIS travellers discover that the crew of an Earth spaceship have been hijacked by the Sensorites, and they in turn are transported to the aliens' planet. Humans and Sensorites alike are stricken by a deadly illness, for which the Doctor struggles to find a cure.

"There's something alien about that Tower." It's 1966, and London's brand new Post Office Tower looms over the Doctor and Dodo as they step from the TARDIS. When the Doctor meets Professor Brett, creator of a new, super-intelligent computer called WOTAN, he is intrigued to hear of a plan to link all the major computers around the world.

The TARDIS arrives on a vast spaceship in the distant future, and the Doctor, Steven, and Dodo meet the only survivors from the planet Earth. They are on a 700 year voyage to the planet Refusis II, in the company of their mute, one-eyed servants the Monoids. Dodo unwittingly spreads her cold amongst the Monoids, and it proves deadly to them. The Doctor provides a cure, and they leave, but the TARDIS jumps forward in time, taking its occupants to the Ark's future.

When the Doctor and his companions Ian, Barbara and Vicki enter a museum on the planet Xeros, they are astonished to find themselves displayed as exhibits! The TARDIS has jumped a 'time track' and offered them a glimpse of what the future could hold... The native Xerons are planning a rebellion against the occupying force of the Moroks who have invaded their world. The Doctor and his friends struggle not only to survive in the midst of battle, but to help change the future sufficiently to ensure their own freedom!

History must take its course...' The TARDIS materialises in the middle of a holy war between King Richard the Lionheart and the Saracen leader, Saladin, in 12th Century Palestine. As the Doctor, Vicki, Ian and Barbara explore their surroundings, they are suddenly caught up in a Saracen ambush - and Barbara is kidnapped. For the time travellers, intrigue and espionage ensue as they once again become involved in living history.

When the TARDIS materialises on an alien planet, the Doctor insists that he and his companions have arrived in the far future. Steven and Dodo think otherwise, however, after they encounter a band of cave-dwelling primitives who are terrified of strangers.

The travellers arrive in the dangerous domain of the Toymaker, where their failure to win at a series of games could result in them becoming his playthings for eternity. Apparently innocuous nursery characters reveal deadly intent, and for companions Steven and Dodo the stakes are raised with every game of blind man's buff and musical chairs. The Doctor, meanwhile, is rendered invisible and given the challenge of completing the fiendishly difficult Trilogic game.

The TARDIS materialises at the Roof of the World, Central Asia, in 1289. There they meet Marco Polo and his fellow travellers on their mammoth journey across the Pamir Plateau and through the Gobi desert to Peking. Unfortunately for the Doctor, his Ship proves to be of immense interest to Polo, who sets his mind on presenting it to the mighty Kublai Khan on arrival at his court.

The Doctor, Jamie, and Zoe become victims of piracy when they materialise on a space beacon, minutes before it is literally blown to pieces. So begins their quest to be reunited with the TARDIS, whilst treading perilously across the paths of the Interstella Space Corps and a gang of murderous bandits.

Five thrilling soundtrack adventures from the early days of Doctor Who, featuring serials lost from the TV archive. The pictures may be lost, but each of these stories survives as a soundtrack recording. Remastered, and with additional linking narration, they can be enjoyed once more. Special linking narration is provided by William Russell, Carole Ann Ford and Peter Purves, who also recall their time making the original episodes in a series of bonus interviews.