Andy jumps into his time-travelling clock and heads back three million years, where he runs into some ancient primates and joins their tribe. Along the way, he helps them fend off a prehistoric big cat, before having his trusty backpack stolen by some hungry vultures.

A lost earring means Andy must go on another time-travelling adventure, as he returns 160 million years into the past to hunt for a prehistoric clamshell. Plunging into the waters of an ancient ocean, Andy meets some giant swimming reptiles and helps them to escape a colossal creature called Predator X.