Connor and Abby are sent to investigate an odd anomaly signal, which keeps appearing and disappearing from the ARC sensors. They travel to a small coastal village, where myths about a sea monster attacking local farm animals are rife. After investigations involving unhelpful locals, they realise they are tracking a dangerous Koolasuchus, which started by attacking cows, but has now moved on the local fisherman.

httpvh://www.youtube.com/watch?v=uFjbZI9DBKo

Primeval continues with episode 5 next Saturday 22nd January at 7pm on ITV1.