Prehistoric Animals Break Into US Parks

Markie is a regular ten-year-old boy who has a normal life. That is until he uses his dad's time opener and accidentally blows it up, leaving the US parks vulnerable to prehistoric and extinct animals. Fortunately, Markie forms a team that deals with the animals, which has him, his friends, and some new companions in it. Now they go on their first adventure to New Mexico to deal with an animal called an Ambulocetus. But will Markie and the group be able to deal with it all by themselves?

In this adventure, Markie and the team are heading for California. In the San Bernardino National Forest, there is trouble brewing. Saber-toothed tigers and giant short-faced bears are creating great havoc. They are really dangerous and put the team in extreme situations. However, things are not what they seem. An unseen figure is watching the team's movements and is doing whatever it can to hinder their efforts in succeeding in this mission. What could possibly happen?

The call coming from the Dakota Grasslands summons the watchers when sail-back reptiles are noticed there. While doing their usual routine in this mission, they are unexpectedly attacked by those sail-back reptiles and some other animals. With these various attacks in different places, the team starts to suspect and wonder if an unknown foe is behind this. They end up in a showdown and discover who the villain really is. How will they be able to foil the plot of this new enemy?

In this next adventure, the Watchers' destination is for Gee Creek Wilderness in the state of Tennessee, where there have been reports of great auks--penguin-like flightless birds. When they attempt to send them back to their time, the birds do not want to go back there. Even more unexpected, the Watchers end up in the time the great auks are from. They then get captured by Vikings, who work for none other than LM himself. There is also something Markie doesn't know that will be shocking and very surprising to him. Who will rescue the watchers from the villain's grasp?