Synopsis: The Doctor phones the Tardis to speak to Amy, but his call goes to voicemail. He tells Amy that he is currently holding a red button which, when he lets go, will cause the spaceship he's on to explode - with him still on board. The Doctor conducts and shares a plan on how Amy could save him, but notices three flaws that could corrupt it; Amy doesn't know his current co-ordinates, she cannot fly the Tardis, and she's is not even onboard the Tardis - as the Doctor remembers that she left "ages ago". He wishes her a Merry Christmas before letting go of the button - in which the spaceship then explodes...
First Broadcast: 6th December 2011
Duration: 01.31Cast: Eleventh Doctor - Matt Smith