Time Flies

Bambera and Savarin are summoned to a secretive genetic research facility by Dr Louise Rix, UNIT's rebellious new scientific adviser. Two scientists have vanished in mysterious circumstances, and despite the assurances of the sinister Dr Grange, UNIT suspects there's something very wrong with the centre's caterpillar population. Can they survive the fruits of Dr Grange's experiments? And will Savarin survive Bambera and Rix's rocky new relationship?