It's 1812, and the Doctor, Steven and Dodo get ready to spend their winter in a Russian village. The French are on their way, but that's not the only invasion the travellers will have to deal with. Written by: Marc Platt. Directed by: Nigel Fairs.

England, 1400. Winter. Blood in the snow. Henry IV has usurped the throne, and deposed King Richard II languishes in Pomfret Castle. Meanwhile the Doctor and his companions preside over New Year revels at Sonning Palace. But Sonning is a prison, treachery is in the air and murderous Archbishop Thomas Arundel will stop at nothing to crush the rebellion. As the Doctor and Barbara take the road to Canterbury, Vicki finds a royal friend, and Ian is dragged into a web of conspiracy at whose heart sits Geoffrey Chaucer.

1950s London: newcomers arrive daily on British shores seeking a fresh start, new opportunities, or simply the chance of a different life. However, some are from much further afield than India or Jamaica.... After an emergency landing, the TARDIS crew must make the best of it, and look to their new neighbours for help. But the Newman family has more than the prejudices of the time to contend with. A sinister force grows in strength amid the pubs, docks and backstreets of London....

Ceres. A tiny, unforgiving ball of ice and rock hanging between Mars and Jupiter. It's no place to live, and it takes a special kind of person to work there. The crew of the Cobalt Corporation mining base know exactly how deadly the world outside their complex is, but the danger isn't just outside anymore. The systems they rely on to keep them safe are failing, and the planet is breaking in. When the TARDIS strands Steven, Vicki and the Doctor on the base, they have to fight a foe they can barely comprehend to survive.

An epic adventure uniting the Doctor's friends across time and space, featuring Jago & Litefoot, Counter-Measures, the Vault and Gallifrey!