Andy Day accidentally breaks a piece of pumice stone at the museum, so he tries to get some more by travelling back in time to the age of the Tyrannosaurus Rex.

Andy Day goes back in time to collect a fern for the museum, and meets a large Diplodocus dinosaur.

Andy Day travels back 106 million years to the time of the Leaellynasaura - a dinosaur that lived in Australia. Along the way he battles with a deadly polar allosaurus.

Andy Day travels back in time to the era of the ammonites, which inhabited Earth 149 million years ago. They were a type of mollusc that lived in shoals in the sea. Andy is challenge to find a shell to replace the one he broke at the museum, and along the way he comes face to face with the eustreptospondylus - a swimming dinosaur.

Andy Day looks at the Iberomesornis - a bird that lived in the forests of Spain approximately 127 million years ago.

Andy Day travels back in time to the era of the Triceratops, a plant-eating dinosaur which roamed the plains of North America.