Sometimes referred to "Series 4b" five special episodes following the regular season were broadcast, starring David Tennant. For these, the Doctor was travelling alone, with each story featuring a one-off companion.
The Doctor faces the end of his life as the Master's plans hurtle out of control. With the sound of drums growing louder, and an ancient trap closing around the Earth, the Doctor and Wilf must fight alone. But sacrifices must be made, and the deadly proph
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