meanwhile, the doctor and barbara are sunbathing. but they see on the 'visualiser' a "broadcast" of the daleks preparing to give a report. the daleks' plan to follow "the enemy time machine" (the tardis) to the sagarro desert on the planet aridius. the daleks plan to take the tardis, find the doctor and his companions, and exterminate them. the doctor and barbara watch the incursion squad embark and dematerialise. the doctor immediately realises that these events happened in the past — the daleks may already be here. they must find ian and vicki and leave immediately.