Prepare for double the action, double the terror and double the Ds. The prehistoric school of bloodthirsty piranhas are back and this time, no one is safe from the flesh-eating fish as they sink their razor sharp teeth into the visitors of summers best attraction, the Big Wet Water Park. Starring Danielle Panabaker, Matt Bush, David Koechner, Chris Zylka, Katrina Bowden, Gary Busey, Christopher Lloyd and David Hasselhoff.