Note: Audio reading of Terrance Dicks' 1974 novelisation.
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Mysterious humans from 22nd Century Earth 'time-jump' back into the 20th Century, so as to assassinate a high-ranking diplomat on whom the peace of the world depends.
The Doctor, Jo Grant and the Brigadier are soon called in to investigate. Jo is accidentally transported to the future; the Doctor follows, eventually to be captured by his oldest and deadliest enemies: the Daleks!
Having submitted the Doctor to the fearful Mind Analysis Machine, the Daleks plan a 'time-jump' attack on Earth in the 20th Century! Can the Doctor and his friends prevent the course of history being drastically altered?
Richard Franklin, who played Mike Yates in the BBC TV series, reads Terrance Dicks's complete and unabridged novelisation, first published by Target Books in 1974.