The Doctor, Susan, Ian and Barbara land on the planet Hydra, where Admiral Jonas Kaan leads a vast flotilla of ships trying to elude the vicious race that has invaded and occupied their world.
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.
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.
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.
