Andy travels 100 million years back to prehistoric times to meet the spinosaurus, a massive meat-eating dinosaur that is even bigger than the T rex! On his adventure, Andy rides a speedy ouranosaurus and takes a dip in a prehistoric river.

Andy goes in search of a woolly rhino, travelling back 50,000 years to a snowy, prehistoric mountain range. Can he find the rhino's favourite food and get back to his time-travelling clock before it returns to the museum?