He is soon accosted by a group of Neanderthals who drag him back to their cave lair .
Upon his arrival in the stone age , Mark ventures out of the space - time machine in search of food and water .
Mark is soon accosted by a group of Neanderthals who drag Mark back to their cave lair .
Upon his arrival in the stone age , Mark ventures out of the space - time machine in search of food and water .