A Tyrannosaurus Rex enters through a time portal into the present, sending the Time Soldiers into action in order to keep the monster from hurting anyone.
When a dinosaur passes through the portal to secure her egg, the Time Soldiers help distract her from doing damage to their town and, in the process, meet some mysterious men who have stolen the video record of their time travels.
When Mikey and Robbie Davis find a time portal in the Green Woods they gather their friends and are transported to a time when dinosaurs roamed the earth.
A year after their previous trip, the Time Soldiers enter the portal again and are transported to a treasure-filled cave, where their attempt to rescue a girl from pirates gets them in big trouble.
When the portal transports them to the Valley of the Kings in ancient Egypt, the Time Soldiers encounter thieves and an angry pharaoh as they try to make their way to safety, and along the way they learn that the amulet may give them some control over their journeys.
After replacing the three oldest members of their group with new recruits, the Time Soldiers enter the portal and travel to England in the Middle Ages, where they face a dragon and an angry knight as they help the future King Arthur to reach the sword in the stone.