Diverging Timelines Book 4: Crisis in the Andes

An unscheduled stop in Peru leads the Doctor and Sam Beckett into a situation which could affect the very fabric of time. Is the Brigadier's death a fixed point that can't be changed? Meanwhile the Master's plans are progressing rapidly thanks to the discovery of a unique meteorite. In addition, Jack and Rose discover just how dangerous the Pi Network is. Warning: Hints at rape.