Farewell, Great Macedon by Moris Farhi, adapted by Nigel Robinson
The TARDIS materialises in the Hanging Gardens of Babylon, one of the Seven Ancient Wonders of the World, in the year 323 BC. The Doctor, Ian, Barbara and Susan meet Alexander the Great - but their excitement is tempered by the realization that these are the final days of Alexander's life.
As the travellers become embroiled in the tragic events, the inevitability of history unfolds around them. But can they - and should they - change it?
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