Dr Xand van Tulleken and Raksha Dave pick up the story eight hours after the destructive earthquake that caused the tsunami wave.

Dr Xand van Tulleken and Raksha Dave pick up the story 90 minutes after the earthquake that caused the deadly wave.

They begin 12 hours before the disaster on Christmas Day, when holidaymakers across Asia were enjoying blissful breaks, unaware that calamity was heading their way as two tectonic plates in the Indian Ocean that had been pushing together for millions of years were about to rupture.