The two of them have a run-in with a pack of Deinonychus, but both manage to acquire the pack's leader and escape. Later they encountered by a vicious antlike alien race known as the Nesk, who attempt to kill Rachel and Tobias.
During their adventure, the two characters face off against a group of Deinonychus, successfully capturing their leader before escaping.  They later come across a dangerous species of ants, known as the Nesk, who try to harm Rachel and Tobias.