Primeval is a British Television show that has 3 seasons but just recently they have aired it on Scifi in the U.S.
Basic Plot: The seemingly impossible becomes a terrifying reality as long-extinct creatures rip through human territory. Mean while Scientist Professor Nick Cutter and his research assistant, Stephen Hart, struggle to find answers. Enlisting the help of zoologist Abby Maitland and student palaeontologist Connor Temple, the four work to uncover the secrets of the temporal anomalies. Yet it soon becomes clear that all traditional methods of research are extinct.