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
This special sees the return of the Cybermen (of the design of the parallel universe's Cybus Industries Cybermen), following their previous appearance in the two-part finale of series two in 2006, "Army of Ghosts"/"Doomsday". Having fallen back in time to Victorian London, the Cybermen create a huge "Cyber-King" with child labour and the help of Miss Hartigan (Dervla Kirwan). Meanwhile Jackson Lake (David Morrissey) has accidentally absorbed the Doctor's memories and thinks himself to be the Doctor.
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