"You will be changed by this cave." So warns Stephen Bishop, slave guide of Kentucky's Mammoth Cave, to a party of tourists in 1842. Before the night is out, two visitors are dead, one is unmasked as an impostor and secrets are revealed, only to be buried deep inside the cave. Rated G. Kids 12 & under $17 dinner & show; $10 show only. Indoors if it rains.