I've lost the TARDIS as well.' I [Amy] was outraged. Considering my husband was dying and we were stranded in the past, the Doctor seemed fairly calm about things. 'Someone's nicked it!' 'Not so much, no.' The Doctor looked awkward. 'There's a mechanism... thingy. If the TARDIS senses a threat it removes itself from the scene. First sign of danger, it goes and hides behind the curtains.' 'Whose genius idea was that?' The Doctor swallowed, embarrassed. He claims to be the last of the most advanced race in the universe. Sometimes, I'm just not convinced.