The best cameo appearances part 1
Does the Doctor Save us or do we save him? Catch Carey Mulligan's one off appearance in Doctor Who this weekend!

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Blink
Series 3, Episode 10 -Sci-fi adventure with David Tennant as the mysterious hero. In an old, abandoned house, the Weeping Angels wait. Only the Doctor can stop them, but he's lost in time.
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Partners in Crime
Series 4, Episode 1 - David Tennant returns in his third series as the titular hero. Donna is determined to find the Doctor, even if it means braving Miss Foster's alien Adipose.
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Closing Time
Series 6, Episode 12 - James Corden returns to Doctor Who in this comedic episode. The Doctor's final days are upon him - but when he drops in on an old friend, the Cybermen are waiting.
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Voyage of the Damned
Christmas Special 2007 - When disaster hits the Titanic, the Doctor uncovers a threat to the whole human race.