Brandon Carp's tourists diving party and instructor Kevin all get wounded after a sudden explosion in a wreck they dive to. First concern is decompression, for which Serena must be locked it too, despite her claustrophobia. In the haste, a missing finger wasn't noticed, hence left behind. Not all symptoms are what they seem. Finally, proctor being dropped at work by a fox in a sports-car raises more speculations from Chris and especially Zambrano.