Heston shadows on an FME shift and witnesses the full horror of Viper for himself, and Emma gets a shock when her first home B&B guests reveal their unusual lifestyle. Karen gets an invitation from a lonely elderly neighbour, but will she be too late to the party?
| Creator | Chris Murray |
|---|---|
| Actor | Elisabeth Dermot Walsh, Dex Lee, Adrian Lewis Morgan |
| Country | United Kingdom, Mexico, South Korea |
| Production | BBC |