Russel T Davies pulls out all the stops to herald a dramatic new dawn for the popular BBC series

Doctor Who fans were surprised with a familiar face as Jodie Whittaker’s 13th Time Lord regenerated into David Tennant in the dramatic conclusion of the show’s BBC centenary special.

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It was previously announced that Scottish actor Tennant, who first stepped into the Tardis in 2005 to play the 10th Doctor, would be returning to the sci-fi series

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Russell T Davies, said: “If you thought the appearance of David Tennant was a shock, we’ve got plenty more surprises on the way.

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Whittaker’s last venture as the Doctor was loaded with drama as it saw her fight for her existence against some of her deadliest enemies: The Master, the Daleks and the Cybermen.

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The episode, titled The Power Of The Doctor, also saw the surprise return of actors who have played Time Lords from the ages .

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