Primeval (2007)

S4E5 The Worm

Title: The Worm Plot: The squad heads to a coastal town to explore a fluctuating Anomaly signal. While Matt and Abby fight to control a swift and lethal Labyrinthodont that’s wreaking havoc, Connor delves into the mystery of the unstable Anomaly. Simultaneously, Emily finds herself imprisoned by Ethan, prompting Matt to race against time to locate and rescue her before it's too late.