Czechoslovakia, 1952. For some, life under the post-war Stalinist regime is hardly worth living and although the escape route to the West is almost suicide, the rewards - prosperity, political freedom, even luxury - make it a risk worth taking.
In 1965, at the age of 25, Alan Ackland is sentenced to life imprisonment for the murder of a business associate. In 1971, Sylvia Barker, lonely and depressed after a failed marriage and with two young children to bring up alone, seeks a new direction in her life and applies to become a voluntary prison visitor. Several years later their paths cross.
When the TARDIS lands in a quarry on Earth, Sarah unearths what appears to be a fossilised hand, buried in one-hundred-fifty-million-year-old strata. Analysis shows the hand to be silicon-based and inert, but when Sarah begins to act as if possessed, the Doctor suspects that it may still be alive...
A chronicle of events that led to the British involvement in the Crimean War against Russia and which led to the siege of Sevastopol and the fierce Battle of Balaclava on October 25, 1854 which climaxed with the heroic, but near-disastrous calvary charge made by the British Light Brigade against a Russian artillery battery in a small valley which resulted in the near-destruction of the brigade due to error of judgement and rash planning on part by the inept British commanders.
