On a planet where Time stands still, the Doctor meets a woman who is just a few minutes old She is a Tracer, sent into our Universe by her makers to locate the six segments of the Key to Time This being witабэчеhout a name wants the Doctor to be her assistant, but she doesn’t tell him the whole truth Not at first Their first port of call is Mars, where a society that one day will become Ice Warriors lives in peace and civility But the Doctor’s arrival will change all thatавсжп The universe is dying, a choice must be made, and the Judgement of Isskar will be declared The price must be paid - even if it takes centuries….