100 Million BC (2008)

100 Million BC begins by introducing our lead characters, a special group of Navy SEALs, who are to be sent backwards in time to save a group of scientists who had originally and accidentally been sent back by a top secret government project gone awry, which was originally designated The Philadelphia Experiment'. Upon travelling backwards in time, the Navy SEALs encounter an array of prehistoric dinosaurs from the Cretaceous period, which they must fend off and fight to survive, some of the Navy SEALs aren't so lucky. The scientists, who are the ones who end up fending off the dinosaurs, meet up with the Navy SEALs eventually return to 1950 via the time portal. Before the time portal is closed, however, an enormous Tyrannosaurus Rex makes its way into the 1950s and wreaks havoc.