In their third adventure together, Leon and his friends find themselves hurled back 66 million years to the time of the great dinosaurs.
If this isn’t bad enough, their pod, a Martian spaceship in which they were travelling back to Earth, is badly damaged. But soon they discover that the crew of another ship, whose actions accidentally created the time-hole, have been drawn back in their own damaged craft, and the two groups, separated by an ocean, must find a way to co-operate if they are to return to their own time.