Episode 1 airs at 8pm on Tuesday 24th May on Watch.

An underground creature brings chaos to the city, forcing the team to chase around the city to track down the movements of this vicious burrowing creature. When the creature strikes for the final time, the team find one of their own in mortal danger and fight to save their life.

> Order the Series 5 DVD on Amazon.

Watch two clips from the episode…

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